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Known Issues in 2021.1.13f1
AI: Crash with ComputeTileMeshJob when generating Navmesh (1329346)
Asset Import Pipeline: Editor crashes while exiting play mode (1328667)
Asset Importers: [MacOS] Second Unity instance in Activity Monitor is "not responding” after importing (1331736)
Audio: Crash on AudioMixer_CUSTOM_FindSnapshot when passing null as an argument to FindSnapshot() (1341752)
Global Illumination: Crash while sculpting Terrain and Baking Lightmaps (1266511)
Global Illumination: Reflection probes must be rebaked twice to update when using "Generate Lighting" button (1334283)
IL2CPP: Build fails when using a combination of messages, SyncVars and SyncList in a project (1328966)
Input: Touch Input doesn't work in Play Mode when running an Editor on a Touchscreen device (1341159)
Linux: Editor crashes at 'GfxFramebufferGLES::SetBackBufferColorDepthSurface' or freezes when creating a new shortcut profile (1334874)
Linux: Linux Editor crashes at "_XFreeX11XCBStructure" when loading tutorials (1323204)
Metal: Performance in Game View is significantly impacted by Gfx.WaitForPresentOnGfxThread when a second monitor is connected (1327408)
Mobile: [Android] App stops due to OnPixelCopyFinishedListener not being supported on devices with lower than 24 SDK (1331290)
Mobile Graphics: [iOS] Player crashing when connecting external Display via USB-C port (1321153)
Packman: User can't easily configure location of both UPM and Asset Store package local cache (1317232)
Profiling: Poor profiler performance when navigating the timeline view and reviewing data with many threads (1339407)
Quality of Life: Crash in SerializedProperty::IsValid when reordering a SerializedProperty list (1320319)
Scene Management: Crash on BuildPrefabInstanceCorrespondingObjectMap when overriding nested prefab inside AssetDatabase.StartAssetEditing() block (1324978)
Scene Management: UnassignedReferenceExeptions with unitypackage when upgrading to 2021.1.2f1 (1341523)
Scripting: Crashes on mono_class_init when entering Play Mode after recompiling scripts (1262671)
Scripting: DomainReloadTests performance tests have regressed due to removal of built-in support for Visual Studio as a code editor (1336648)
Scripting: Increased Script Assembly reload time (1323490)
Terrain: Terrain Lit Opacity as Density option causes alpha'd areas on the 5th layer or greater to appear with artifacts (1283124)
Video: Video player fails to start playing and null handle errors are thrown when running Unity Editor/Build with specific hardware (1237818)
Vulkan: Linux Editor using Vulkan crashes at " GfxDeviceVK::EnsureValidBackbuffer" when showing tooltips for ProBuilder buttons (1335846)
WebGL: [iOS] Video is not playing (1288692)
Windows: Editor crashes when exiting and keeping a tutorial project (1338299)
2021.1.13f1 Release Notes
Editor: Improved Inspector Preview performance for complex prefabs. (1295887)
Physics: Improved the stability of the HingeJoint2D angular lower/upper limits when using higher motor/external forces. (1339471)
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.
2D: Fixed missing reference on 2D default assets when upgrading project from 20.3. (1341434)
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)
Android: Fixed an issue where all microphones reported the same recording state when bluetooth microphone was connected. (1298249)
Android: Fixed compositor error log when using linear rendering on some MediaTek/PowerVR SoCs. (1330183)
Android: Fixed severe disk I/O regression on Android 5.0.x. (1287681)
Animation: Fixed performance regression when updating curves in Animation Window. (1320250)
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)
GI: Fixed a black baked reflection probes issue when using a non-progressive baking. (1324246)
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)
Particles: Fixed an occasional error message and invalid bounding box, when using the Collision Module in Planes mode. (1282268)
Scripting: Fixed a crash when generic type derives from abstract MonoBehaviour. (1333819)
Scripting: Fixed the error message displayed when drag&dropping a script file that had no matching class onto a game object. (1106237)
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)
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)
VFX Graph: Fixed a possible crash with sorting on particle system without kill. (1333851)
VFX Graph: Fixed an unexpected missing binding of deadElementCount dispatching sort issue. (1311837)
WebGL: Fixed an issue where Enabling "Frame Timing Stats" option in the Standalone Player Settings breaks WebGL1. (1297871)