### Known Issues in 2018.4.21f1 * Animation: Animator.Update CPU time spikes when multiple animations are playing ([1184690](https://issuetracker.unity3d.com/issues/animator-dot-update-cpu-time-spikes-when-multiple-animations-are-playing)) * Package Manager: Immutable packages altered by the API Updater are reverted to their original state when packages are resolved, which can lead to slower import performance in that context. * Profiling: Editor crashes when loading profiler file with memcpy stacktrace ([1131782](https://issuetracker.unity3d.com/issues/editor-crashes-when-loading-profiler-file-with-memcpy-stacktrace)) * macOS: If the Android Tools are not installed through the Hub, macOS 10.15 (Catalina) default security settings will prevent the Android NDK binaries being executed. These settings have to be changed or a signed Android NDK (r16b) will be needed to build Android. More information here: https://developer.android.com/ndk/downloads/older\_releases. ### 2018.4.21f1 Release Notes #### Fixes * Android: Fixed a crash when using GraphicsJobs with Vulkan on Adreno 5xx. ([1167283](https://issuetracker.unity3d.com/issues/android-lwrp-vulkan-build-crashes-when-having-any-object-in-front-of-the-camera)) * Android: Fixed an issue where warning was being logged if app aborted during a UnityWebRequest. ([1223723](https://issuetracker.unity3d.com/issues/android-closing-app-with-an-unfinished-unitywebrequest-throws-a-timeout-while-trying-to-pause-the-unity-engine-warning)) * Android: Fixed an issue with overwriting gradle.properties file with a gradle template file in Plugins/Android. ([1141877](https://issuetracker.unity3d.com/issues/android-gradle-build-fails-with-androidx-libraries)) * Audio: AudioSource.GetSpatializerFloat and AudioSource.SetSpatializerFloat can now be called successfully before an AudioSource is first played. (1226913) * Graphics: Fixed a crash where instancing properties are absent from the MaterialPropertyBlock object sent to DrawMeshInstanced calls. Fixed path-finding bug in which floating point errors would cause agents to take potentially large, spurious detours. (1115627) * Graphics: Fixed an exception while baking light, when the scene objects are being moved. ([1128734](https://issuetracker.unity3d.com/issues/baking-light-causes-error-internal-jobtempalloc-has-allocations-that-are-more-than-4-frames-old)) * Graphics: Fixed an issue with DX11 blit operations crashing when shader recompilation is triggered. ([1221358](https://issuetracker.unity3d.com/issues/editor-crashes-on-constantbuffersd3d11base-setbuiltincbconstant-when-creating-a-new-standart-surface-shader)) * IL2CPP: Corrected set the value of by reference parameters in the caller for some generic virtual method call cases. ([1212919](https://issuetracker.unity3d.com/issues/il2cpp-incorrectly-boxes-values-when-using-generic-virtual-methods-on-structs)) * IL2CPP: Fixed an error while processing the Unity.Entities assembly due to incorrect handling of a generic virtual method on a generic type. ([1176672](https://issuetracker.unity3d.com/issues/errors-appear-on-build-and-run-with-il2cpp-while-loading-properties-package)) * IL2CPP: Generate less source code for managed debugging. ([1205136](https://issuetracker.unity3d.com/issues/ios-arm64-branch-out-of-range-747396072-max-is-plus-slash-128mb-xcode-error-when-building-development-build-with-script-debugging)) * iOS: Fixed an issue where the crash reporter was crashing when you breakpoint an iOS crash. ([1168277](https://issuetracker.unity3d.com/issues/ios-crash-during-shutdown)) * iOS: Fixed a crash when trying to use metal on simulator (this is supported starting with unity 2020.1). ([1227049](https://issuetracker.unity3d.com/issues/ios-simulator-fails-to-launch-with-gfx-device-initialization-failed-error)) * iOS: Fixed an issue with copy across referenced images from the launch screen storyboard during build times. ([1187103](https://issuetracker.unity3d.com/issues/ios-storyboards-referenced-resources-are-not-exported-to-xcode-project)) * iOS: Screen.SafeArea should be reported correctly after the app is paused and it's orientation is changed. ([1190735](https://issuetracker.unity3d.com/issues/ios-screen-dot-safearea-values-are-incorrect-after-app-pause-and-orientation-change)) * iOS: Screen.SafeArea should no longer reset to zeros after custom view is presented on iOS 13. ([1190454](https://issuetracker.unity3d.com/issues/ios-safe-area-resets-to-zeros-after-custom-view-is-presented-on-ios-13)) * Particles: Fixed an issue where particle lights being re-rendered over multiple frames. (1233190) * Prefabs: Fixed a null reference exception is thrown when applying modified Button UI component property to prefab. ([1172835](https://issuetracker.unity3d.com/issues/null-reference-exception-is-thrown-when-applying-modified-button-ui-component-property-to-prefab)) * Profiler: Fixed an issue where Profiler Window not remembering the view type of CPU module across sessions. ([1231941](https://issuetracker.unity3d.com/issues/cpu-usage-profiler-opens-up-to-timeline-view-on-every-session-not-remembering-state)) * Profiler: Fixed Performance decrease in EditorOverhead using Deep Profile. ([1051094](https://issuetracker.unity3d.com/issues/performance-decrease-in-editoroverhead-using-deep-profile)) * Scripting: Fixed a possible crash caused by race condition during startup when the script debugger and profiler systems are enabled. * Video: Application.Quit hangs the application after VideoPlayer.prepare is called on a disabled GameObject. ([1185216](https://issuetracker.unity3d.com/issues/application-dot-quit-hangs-the-application-after-videoplayer-dot-prepare-is-called-on-a-disabled-gameobject-on-windows)) * Video: Fixed an issue where disabled VideoPlayer warning shows up when VideoClip field gets set to null in OnDestroy() method. ([1206210](https://issuetracker.unity3d.com/issues/disabled-videoplayer-warning-shows-up-when-videoclip-field-gets-set-to-null-in-ondestroy-method)) * Video: Fixed an issue where hang on quit after failing to load large number of Video Clips from URL at once. ([1197716](https://issuetracker.unity3d.com/issues/unity-hangs-on-quit-after-failing-to-load-large-number-of-video-clips-from-url-at-once)) * XR: Fixed an issue where unstable video and texture buffer resources when using Windows Mixed Reality. ([1209909](https://issuetracker.unity3d.com/issues/hl2-mixed-reality-capture-with-render-from-pv-cam-feature-turned-on-has-unstable-video))