### Known Issues in 2021.1.25f1

*   Asset Bundles: Building process of the AssetBundles is slow when the file count is huge ([1358059](https://issuetracker.unity3d.com/issues/building-process-of-the-assetbundles-is-slow-when-the-file-count-is-huge))
    
*   Asset Importers: Instantiated FBX through code throws error after leaving Play Mode ([1363573](https://issuetracker.unity3d.com/issues/instantiated-fbx-through-code-throws-error-after-leaving-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))
    
*   Global Illumination: Crash while sculpting Terrain and Baking Lightmaps ([1266511](https://issuetracker.unity3d.com/issues/crash-while-sculpting-terrain))
    
*   Global Illumination: \[Enlighten\] Fatal Error when closing the Editor while Generating Lighting ([1354238](https://issuetracker.unity3d.com/issues/fatal-error-when-closing-the-editor-while-generating-lighting))
    
*   Global Illumination: \[LightProbes\] Probes lose their lighting data after entering Play mode when Baked and Realtime GI are enabled ([1052045](https://issuetracker.unity3d.com/issues/light-probes-lose-their-lighting-data-after-entering-play-mode-when-baked-and-realtime-gi-are-enabled))
    
*   IL2CPP: \[Android\] \[IL2CPP\] Old build artifacts are used when ARMv7 and ARM64 build follows a ARM64 only build from different git branch ([1347245](https://issuetracker.unity3d.com/issues/android-il2cpp-old-build-artifacts-are-used-when-armv7-and-arm64-build-follows-a-arm64-only-build-from-different-git-branch))
    
*   Input: Input.GetKey does not trigger when the mouse cursor is outside the Game window ([1358134](https://issuetracker.unity3d.com/issues/input-dot-getkey-does-not-trigger-when-the-mouse-cursor-is-outside-the-game-window))
    
*   MacOS: Port count never stops increasing in Standalone build on Mac Standalone ([1365570](https://issuetracker.unity3d.com/issues/port-count-never-stops-increasing-in-standalone-build-on-mac-standalone))
    
*   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))
    
*   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: Profiler's timeline view loses context frames when frames go out of Frame Count bounds ([1367470](https://issuetracker.unity3d.com/issues/timeline-view-looses-context-frames-when-frames-go-out-of-frame-count-bounds))
    
*   Quality of Life: Scrolling is jumping when scrolling in the Input Manager ([1362327](https://issuetracker.unity3d.com/issues/scrolling-is-jumping-when-scrolling-in-the-input-manager))
    
*   Scripting: Unity does not execute code weavers when the project is opened for the first time ([1350116](https://issuetracker.unity3d.com/issues/unity-does-not-execute-code-weavers-when-its-opened-for-the-first-time))
    
*   uGUI: Poor performance when loading or unloading a large Scene ([1360901](https://issuetracker.unity3d.com/issues/poor-performance-when-loading-or-unloading-a-large-scene))
    
*   Vulkan: \[Editor\] The Scene's GameObjects textures are seemingly random and change colours depending on the Scene's Camera pos. ([1337772](https://issuetracker.unity3d.com/issues/vulkan-editor-the-scenes-gameobjects-textures-are-seemingly-random-and-change-colours-depending-on-the-scenes-camera-pos))
    
*   XR: \[Linux\] Scene View doesn't render when opening new AR or VR Template project or pressing "Show Tutorials" ([1362435](https://issuetracker.unity3d.com/issues/xr-linux-scene-view-doesnt-render-when-opening-new-ar-or-vr-template-project-or-pressing-show-tutorials))
    

### 2021.1.25f1 Release Notes

#### Improvements

*   2D: Cache internal reflection to speed up Sprite editing data access.
    
*   Graphics: Warnings for non-native compressed formats with decompressor support are now muted in the editor. (1329157)
    
*   Package: Update Addressables to 1.18.6 and SBP to 1.19.2
    

#### Fixes

*   2D: Fixed an issue where the Sprite Editor Window was disabled when readonly assets were selected. ([1364044](https://issuetracker.unity3d.com/issues/2d-sprite-editor-instantiated-default-assets-can-be-edited-in-sprite-editor))
    
*   Animation: Fixed unexpected behaviours when having negative parameterized time in a motion state. ([1332880](https://issuetracker.unity3d.com/issues/animationevent-is-triggered-multiple-times))
    
*   Asset Pipeline: Fixed an issue where the Editor crashed while entering play mode with an AssetImporter displayed in the Inspector window. ([1353925](https://issuetracker.unity3d.com/issues/editor-crashes-on-unityeditor-dot-unsupported-isdestroyscriptableobject-when-applying-changes-to-a-custom-asset))
    
*   Editor: Fixed an issue where there was not a prompt to save changes if the layout had changed. ([1318376](https://issuetracker.unity3d.com/issues/changing-layout-or-maximizing-closes-windows-with-changes-but-does-not-prompt-save-dialog))
    
*   Editor: Fixed an issue where Time.unscaledTime and Time.fixedUnscaledTime did not update when stepping through frames. ([1294730](https://issuetracker.unity3d.com/issues/time-dot-unscaledtime-and-time-dot-fixedunscaledtime-do-not-update-when-stepping-through-frames), [1360931](https://issuetracker.unity3d.com/issues/frame-stepping-not-working-on-addressables-operations))
    
*   Editor: Fixed an issue with Multiple "Failed to insert item" warnings being logged when the amount of inserted items exceeds 1000. ([1343433](https://issuetracker.unity3d.com/issues/multiple-failed-to-insert-item-warnings-logged-when-amount-of-inserted-items-exceeds-1000))
    
*   Editor: If Adb is not able to make the file editable, we make it writable using OS function. ([1353760](https://issuetracker.unity3d.com/issues/theres-no-warning-slash-error-for-projectversion-dot-txt-not-being-updated-due-to-lack-of-write-permissions-when-upgrading-the-project))
    
*   GI: Fixed sky ambient probe and skybox reflection probe issue when reloading a scene in playmode. ([1331427](https://issuetracker.unity3d.com/issues/the-scenes-lighting-settings-are-not-updated-and-saved-when-auto-generate-option-is-disabled))
    
*   GI: Prevent tetrahedralization errors by removing duplicate data from additive probesets. If anything is left, append the rest. ([1263524](https://issuetracker.unity3d.com/issues/additive-loading-of-overlapping-sets-of-light-probes-cause-artifacting-on-objects-in-a-scene))
    
*   Graphics: Fixed a sporadic crash when closing BuildSettings (and maybe other) windows when using Editor with Vulkan. ([1362844](https://issuetracker.unity3d.com/issues/vulkan-editor-crashes-vk-optimusgetinstanceprocaddr-after-closing-build-settings-window))
    
*   Graphics: Fixed an issue of missing objects when highly static batched scene + SRP Batcher. ([1294742](https://issuetracker.unity3d.com/issues/shadows-start-flickering-when-using-srp-batcher))
    
*   Graphics: Fixed an issue where Meshes had incorrect skin weights in builds due to faulty normalization after limiting the number of weights per vertex. (1319068)
    
*   Networking: UnityWebRequest: Fix raw data access in DownloadHandlerAudioClip and DownloadHandlerTexture. ([1330209](https://issuetracker.unity3d.com/issues/unitywebrequest-downloadhandler-dot-data-is-null-after-downloading-a-texture-using-unitywebrequesttexture-dot-gettexture))
    
*   Particles: Fixed a crashes when trying to access fields in an uninitialized external forces module. ([1354044](https://issuetracker.unity3d.com/issues/editor-crashes-when-inspecting-serialized-field-particlesystem-variable-in-visual-studio-code-debugger-that-is-not-assigned))
    
*   Physics: Fixed an issue where modifying the "Rigidbody2D.position" did not temporarily stop interpolation when called during the FixedUpdate callback. ([1367721](https://issuetracker.unity3d.com/issues/modifying-rigidbody2d-dot-position-doesnt-stop-interpolation-when-called-during-the-fixedupdate-callback))
    
*   Profiler: Fixed an issue where entering Play Mode with the Game View set to 'Play Maximized' and the Profiler window docked causes errors to be logged to the Console window. ([1364443](https://issuetracker.unity3d.com/issues/guistyle-errors-are-thrown-when-entering-play-mode-with-docked-profiler-and-the-maximize-on-play-option-enabled))
    
*   Scene/Game View: Fixed an issue where Hierarchy did not allow drag and drop references to be placed between root objects marked as not editable. ([1337512](https://issuetracker.unity3d.com/issues/gameobjects-cannot-be-placed-between-objects-with-the-noteditable-flag-when-reordering-objects-in-the-hierarchy))
    
*   Scripting: Fixed an issue where there were handle exceptions thrown from custom attributes' .ctor. ([1321144](https://issuetracker.unity3d.com/issues/attribute-throwing-exception-used-together-with-requirecomponent-attribute-will-crash-unity))
    
*   Serialization: Fixed an issue where reference from a Prefab to a missing asset became valid once asset was added back to project, without a reimport. ([1270634](https://issuetracker.unity3d.com/issues/references-on-prefabs-arent-automatically-added-when-the-target-of-the-missing-reference-is-imported))
    
*   Serialization: Keep references to unknown ScriptableObject as "Missing" instead becoming "None" when loading Scene or Prefab. ([1328065](https://issuetracker.unity3d.com/issues/null-references-on-prefab-after-changes-are-made-to-scriptableobject-guid-and-public-script-references))
    
*   Services: Fixed an issue where the validation endpoint was been disabled, and the editor incorrectly shows that the user must wait for this validation to succeed. This lead to a lot of confusion from our users. This change simply removes this panel to avoid further confusion. ([1210052](https://issuetracker.unity3d.com/issues/analytics-analytics-window-doesnt-refresh-on-entering-play-mode-in-the-editor))
    
*   uGUI: Fixed an issue where a missing shader property warnings was produced when running in batchmode. ([1350059](https://issuetracker.unity3d.com/issues/an-error-is-thrown-when-the-scene-has-ui-mask-and-the-player-is-run-headless))
    
*   Universal Windows Platform: Fixed an issue where symbol file packaging failed when using the 'MasterWithLTCG' build configuration. ([1345403](https://issuetracker.unity3d.com/issues/uwp-failed-to-copy-pdb-error-appear-when-building-solution-with-masterwithltcg))
    
*   Universal Windows Platform: Fixed DevicePortal deployment to handle both .appx and .msix packages. ([1269676](https://issuetracker.unity3d.com/issues/deployment-to-hololens-fails-when-deploying-app-through-windows-device-portal))
    
*   Windows: Fixed an issue where the player icon was missing from the title after the game was first launched in fullscreen mode and then later changed to windowed mode. ([1361016](https://issuetracker.unity3d.com/issues/player-icon-is-missing-from-the-title-bar-when-the-player-is-started-in-fullscreen-mode))
    
*   Windows: Removed error.log generation for crash uploads in favor of editor.log and dmp files. (1278602)