### Known Issues in 2021.1.13f1

*   AI: Crash with ComputeTileMeshJob when generating Navmesh ([1329346](https://issuetracker.unity3d.com/issues/crash-with-computetilemeshjob-when-generating-navmesh))
    
*   Asset Import Pipeline: Editor crashes while exiting play mode ([1328667](https://issuetracker.unity3d.com/issues/editor-crashes-while-exiting-play-mode))
    
*   Asset Importers: \[MacOS\] Second Unity instance in Activity Monitor is "not responding” after importing ([1331736](https://issuetracker.unity3d.com/issues/macos-second-unity-instance-in-activity-monitor-is-not-responding-after-importing))
    
*   Audio: Crash on AudioMixer\_CUSTOM\_FindSnapshot when passing null as an argument to FindSnapshot() ([1341752](https://issuetracker.unity3d.com/issues/crash-on-audiomixer-custom-findsnapshot-when-passing-null-as-an-argument-to-findsnapshot))
    
*   Global Illumination: Crash while sculpting Terrain and Baking Lightmaps ([1266511](https://issuetracker.unity3d.com/issues/crash-while-sculpting-terrain))
    
*   Global Illumination: Reflection probes must be rebaked twice to update when using "Generate Lighting" button ([1334283](https://issuetracker.unity3d.com/issues/reflection-probes-must-be-rebaked-twice-to-update-when-using-generate-lighting-button))
    
*   IL2CPP: Build fails when using a combination of messages, SyncVars and SyncList in a project ([1328966](https://issuetracker.unity3d.com/issues/il2cpp-build-fails-when-using-a-combination-of-messages-syncvars-and-synclist-in-a-project))
    
*   Input: Touch Input doesn't work in Play Mode when running an Editor on a Touchscreen device ([1341159](https://issuetracker.unity3d.com/issues/touch-input-doesnt-work-in-play-mode-when-running-an-editor-on-a-touchscreen-device))
    
*   Linux: Editor crashes at 'GfxFramebufferGLES::SetBackBufferColorDepthSurface' or freezes when creating a new shortcut profile ([1334874](https://issuetracker.unity3d.com/issues/editor-crashes-at-gfxframebuffergles-setbackbuffercolordepthsurface-or-freezes-when-creating-a-new-shortcut-profile))
    
*   Linux: Linux Editor crashes at "\_XFreeX11XCBStructure" when loading tutorials ([1323204](https://issuetracker.unity3d.com/issues/linux-editor-crashes-at-xfreex11xcbstructure-when-loading-tutorials))
    
*   Metal: Performance in Game View is significantly impacted by Gfx.WaitForPresentOnGfxThread when a second monitor is connected ([1327408](https://issuetracker.unity3d.com/issues/performance-in-game-view-is-significantly-impacted-by-gfx-dot-waitforpresentongfxthread-when-a-second-monitor-is-connected))
    
*   Mobile: \[Android\] App stops due to OnPixelCopyFinishedListener not being supported on devices with lower than 24 SDK ([1331290](https://issuetracker.unity3d.com/issues/app-stops-due-to-onpixelcopyfinishedlistener-not-being-supported-on-devices-with-lower-than-24-sdk))
    
*   Mobile Graphics: \[iOS\] Player crashing when connecting external Display via USB-C port ([1321153](https://issuetracker.unity3d.com/issues/ios-player-crashing-when-connecting-external-display-via-usb-c-port))
    
*   Packman: User can't easily configure location of both UPM and Asset Store package local cache ([1317232](https://issuetracker.unity3d.com/issues/user-cant-easily-configure-location-of-both-upm-and-asset-store-package-local-cache))
    
*   Profiling: Poor profiler performance when navigating the timeline view and reviewing data with many threads ([1339407](https://issuetracker.unity3d.com/issues/poor-profiler-performance-when-navigating-the-timeline-view-and-reviewing-data-with-many-threads))
    
*   Quality of Life: Crash in SerializedProperty::IsValid when reordering a SerializedProperty list ([1320319](https://issuetracker.unity3d.com/issues/crash-in-serializedproperty-isvalid-when-reordering-a-serializedproperty-list))
    
*   Scene Management: Crash on BuildPrefabInstanceCorrespondingObjectMap when overriding nested prefab inside AssetDatabase.StartAssetEditing() block ([1324978](https://issuetracker.unity3d.com/issues/crash-on-buildprefabinstancecorrespondingobjectmap-when-overriding-nested-prefab-inside-assetdatabase-dot-startassetediting-block))
    
*   Scene Management: UnassignedReferenceExeptions with unitypackage when upgrading to 2021.1.2f1 ([1341523](https://issuetracker.unity3d.com/issues/unassignedreferenceexeptions-with-unitypackage-when-upgrading-to-2021-dot-1-2f1))
    
*   Scripting: Crashes on mono\_class\_init when entering Play Mode after recompiling scripts ([1262671](https://issuetracker.unity3d.com/issues/crashes-on-mono-class-init-when-entering-play-mode-after-recompiling-scripts))
    
*   Scripting: DomainReloadTests performance tests have regressed due to removal of built-in support for Visual Studio as a code editor ([1336648](https://issuetracker.unity3d.com/issues/domainreloadtests-performance-tests-have-regressed-due-to-removal-of-built-in-support-for-visual-studio-as-a-code-editor))
    
*   Scripting: Increased Script Assembly reload time ([1323490](https://issuetracker.unity3d.com/issues/increased-reload-time))
    
*   Terrain: Terrain Lit Opacity as Density option causes alpha'd areas on the 5th layer or greater to appear with artifacts ([1283124](https://issuetracker.unity3d.com/issues/terrain-lit-opacity-as-density-option-causes-alphad-areas-on-the-5th-layer-or-greater-to-appear-with-artifacts))
    
*   Video: Video player fails to start playing and null handle errors are thrown when running Unity Editor/Build with specific hardware ([1237818](https://issuetracker.unity3d.com/issues/video-player-fails-to-start-playing-and-null-handle-errors-are-thrown-when-running-unity-editor-slash-build-with-specific-hardware))
    
*   Vulkan: Linux Editor using Vulkan crashes at " GfxDeviceVK::EnsureValidBackbuffer" when showing tooltips for ProBuilder buttons ([1335846](https://issuetracker.unity3d.com/issues/linux-editor-using-vulkan-crashes-at-gfxdevicevk-ensurevalidbackbuffer-when-showing-tooltips-for-probuilder-buttons))
    
*   WebGL: \[iOS\] Video is not playing ([1288692](https://issuetracker.unity3d.com/issues/webgl-ios-video-is-not-playing-on-ios))
    
*   Windows: Editor crashes when exiting and keeping a tutorial project ([1338299](https://issuetracker.unity3d.com/issues/editor-crashes-when-exiting-and-keeping-a-new-micrograme-project))
    

### 2021.1.13f1 Release Notes

#### Improvements

*   Editor: Improved Inspector Preview performance for complex prefabs. ([1295887](https://issuetracker.unity3d.com/issues/gameobject-slash-prefab-inspector-preview-is-slow-for-complex-hierarchies))
    
*   Physics: Improved the stability of the HingeJoint2D angular lower/upper limits when using higher motor/external forces. ([1339471](https://issuetracker.unity3d.com/issues/hingjoint2d-overextends-angle-limits-when-motor-speed-values-are-high))
    

#### Changes

*   Editor: Updated com.unity.cinemachine to versions 2.7.4/2.8.0-pre.1.
    
*   Package: Updated com.unity.purchasing to version 3.2.2.
    
*   XR: Updated OpenXR Package to version 1.2.2.
    

#### Fixes

*   2D: Fixed missing reference on 2D default assets when upgrading project from 20.3. ([1341434](https://issuetracker.unity3d.com/issues/2d-sprite-upgrading-project-from-20-dot-3-to-21-dot-1-causes-default-sprite-in-scene-to-lose-reference))
    
*   AI: Fixed an OffMeshLink and NavMeshLink issue where sometimes they are not automatically reconnected after navigation mesh carving. (1287238)
    
*   Android: Fixed an issue where there was an incorrect label for Proguard template. ([1316757](https://issuetracker.unity3d.com/issues/custom-progruard-file-name-in-the-project-settings-does-not-match-with-the-created-file-in-project-windows))
    
*   Android: Fixed an issue where all microphones reported the same recording state when bluetooth microphone was connected. ([1298249](https://issuetracker.unity3d.com/issues/android-microphones-status-is-incorret-for-microphone-dot-isrecording-api-when-connect-with-bluetooth-microphone))
    
*   Android: Fixed compositor error log when using linear rendering on some MediaTek/PowerVR SoCs. ([1330183](https://issuetracker.unity3d.com/issues/android-device-logs-color-format-for-dp-is-invalid-when-deploying-with-linear-color-space))
    
*   Android: Fixed severe disk I/O regression on Android 5.0.x. ([1287681](https://issuetracker.unity3d.com/issues/android-5-dot-0-i-slash-o-performance-resources-dot-loadasync-10-30x-slower-on-some-android-5-dot-0-x-devices))
    
*   Animation: Fixed performance regression when updating curves in Animation Window. ([1320250](https://issuetracker.unity3d.com/issues/perfomance-regression-animationwindowstate-get-allcurves-takes-approximately-5000ms-to-load-animation-in-the-animation-window))
    
*   Asset Pipeline: Fixed an issue where "GetRequiredComponents result must be in cache, if requested from non-main thread." assert got raised, when downloading asset from cache server. (1338565)
    
*   Asset Pipeline: Fixed for loaded native assets that could get unnecessarily reloaded after a domain reload. (1323425)
    
*   Core: Fixed an issue that caused incremental garbage collection to sometimes fail to use all of the available spare time before vsync. (1329186)
    
*   Documentation: Fixed a html issue in TestRunnerApi API code snippet.  
    Fixed a typo in PreBuildSetup code example.  
    Fixed an incorrect syntax in command line reference.
    
*   Editor: Fixed an issue where the editor showed the static batching with instancing shaders warning when static batching was disabled for the current build platform. ([1332277](https://issuetracker.unity3d.com/issues/this-renderer-uses-static-batching-and-instanced-shaders-warning-is-thrown-even-when-static-batching-is-disabled))
    
*   GI: Fixed a black baked reflection probes issue when using a non-progressive baking. ([1324246](https://issuetracker.unity3d.com/issues/reflection-probes-doesnt-contain-indirect-scene-lighting-after-the-on-demand-gi-bake-from-the-lighting-window))
    
*   Package Manager: Fixed the 401 Response code when a user tried to download a paid asset store package in My Assets.  
    Check ToS agreement before download and redirect user to Asset Store web page in order to read and accept terms. ([1335976](https://issuetracker.unity3d.com/issues/package-manager-slash-my-assets-401-response-code-trying-to-download-a-paid-asset-store-package))
    
*   Particles: Fixed an occasional error message and invalid bounding box, when using the Collision Module in Planes mode. ([1282268](https://issuetracker.unity3d.com/issues/invalid-worldaabb-errors-are-thrown-when-using-particle-system-with-collision-enabled-and-multiple-planes))
    
*   Scripting: Fixed a crash when generic type derives from abstract MonoBehaviour. ([1333819](https://issuetracker.unity3d.com/issues/editor-crashes-on-mono-log-write-logfile-when-opening-a-project))
    
*   Scripting: Fixed the error message displayed when drag&dropping a script file that had no matching class onto a game object. ([1106237](https://issuetracker.unity3d.com/issues/incorrect-error-dialog-appears-when-trying-to-attach-script-with-spaces-in-the-file-name))
    
*   Scripting: Fixed Time.unscaledDeltaTime from returning negative values when OnDemandRendering was used. (1329148)
    
*   UI Elements: Fixed drawing behavior issue when multiple inspectors were opened and multiple objects were selected.
    
*   UI Toolkit: Fixed an issue with inspector fields failing to get focused when clicked depending on neighboring fields. ([1335344](https://issuetracker.unity3d.com/issues/serialized-attribute-cannot-be-focused-and-written-in-when-it-goes-after-textarea-field))
    
*   UI Toolkit: Fixed an UnauthorizedAccessException error that was thrown when trying to save files under Version Control. The fix is to ensure to checkout control-versioned uss and uxml upon save. ([1316724](https://issuetracker.unity3d.com/issues/ui-builder-unauthorizedaccessexception-is-thrown-when-trying-to-save-files-under-version-control))
    
*   VFX Graph: Fixed a possible crash with sorting on particle system without kill. ([1333851](https://issuetracker.unity3d.com/issues/unity-editor-crashes-when-opening-a-scene-with-specific-visual-effects-componenets))
    
*   VFX Graph: Fixed an unexpected missing binding of deadElementCount dispatching sort issue. ([1311837](https://issuetracker.unity3d.com/issues/dx12-compute-shader-sort-property-deadelementcount-at-kernel-index-0-when-building-player-with-vfx-multi-mesh))
    
*   WebGL: Fixed an issue where Enabling "Frame Timing Stats" option in the Standalone Player Settings breaks WebGL1. (1297871)