Known Issues in 2021.1.21f1

  • Ads: [Android] Unity Ad return app to Lock screen (1281041)

  • Asset Import Pipeline: Editor crashes with out of memory while importing a lot of assets (mostly textures) at once, on Windows/DX11 (1324536)

  • Asset Importers: Editor crashes on UnityEditor.Unsupported:IsDestroyScriptableObject when applying changes to a custom asset (1353925)

  • Asset Importers: [MacOS] Second Unity instance in Activity Monitor is "not responding” after importing (1331736)

  • Audio: Crash on AudioCustomFilter::GetOrCreateDSP when recompiling scripts while in Play Mode (1354002)

  • Global Illumination: Crash while sculpting Terrain and Baking Lightmaps (1266511)

  • Global Illumination: [Enlighten] Fatal Error when closing the Editor while Generating Lighting (1354238)

  • Global Illumination: [LightProbes] Probes lose their lighting data after entering Play mode when Baked and Realtime GI are enabled (1052045)

  • IMGUI: Scrolling is jumping when scrolling in the Input Manager (1362327)

  • Input: Input.GetKey does not trigger when the mouse cursor is outside the Game window (1358134)

  • Linux: Linux Editor crashes at "_XFreeX11XCBStructure" when loading tutorials (1323204)

  • Mobile: [Android] App stops due to OnPixelCopyFinishedListener not being supported on devices with lower than 24 SDK (1331290)

  • Mono: [Mono Upgrade] CommandBuffer native plugin events hang in the Editor (1308216)

  • Packman: User can't easily configure location of both UPM and Asset Store package local cache (1317232)

  • Profiling: GUIStyle errors are thrown when entering Play mode with docked Profiler and the "Maximize On Play" option Enabled (1364443)

  • Profiling: Profiler.GetTotalAllocatedMemoryLong increases when Scene is loaded and unloaded (1364643)

  • Quality of Life: Crash on GUIView::DoPaint when selecting color with a color picker (1355078)

  • Scene Management: Poor performance when loading or unloading a large Scene (1360901)

  • Scripting: Crashes on mono_class_init when entering Play Mode after recompiling scripts (1262671)

  • Scripting: Increased Script Assembly reload time (1323490)

  • Scripting: Performance degradation when activating or deactivating uGUI GameObject (1348763)

  • Scripting: Unity does not execute code weavers when the project is opened for the first time (1350116)

  • Settings Window: [Mobile Notifications] Editor crashes when clicking on any category while Mobile Notifications pane is open (1361351)

  • Terrain: Terrain Lit Opacity as Density option causes alpha'd areas on the 5th layer or greater to appear with artifacts (1283124)

  • Vulkan: [Editor] The Scene's GameObjects textures are seemingly random and change colours depending on the Scene's Camera pos. (1337772)

  • XR: [Linux] Scene View doesn't render when opening new AR or VR Template project or pressing "Show Tutorials" (1362435)

2021.1.21f1 Release Notes


  • Profiler: Released com.unity.performance.profile-analyzer@1.1.0 with a series of fixed and improvements. More details at

API Changes

  • Graphics: Added: A new API for compiling shaders from editor code and obtaining reflection info was added to ShaderData.Pass.


  • Code Editor: Update com.unity.ide.vscode package to 1.2.4.

  • Package Manager: Change error and warning box to look like the info box.


  • Android: Fixed an issue where a looping, streaming video caused a Unity app to drop frames or freeze, if network latency was really high. (1341573)

  • Asset Bundles: Fixed an issue with Asset Bundle determinism. (1346263)

  • Asset Pipeline: Fixed a crash inside Physics Manager when a Default Material was present and shut down. (1338910)

  • Asset Pipeline: Fixed a crash that occurred if ImportAsset was called with "Assets\" path. Also fixed an issue where any folder path ending with path separator did not get imported. (1354411)

  • Editor: Prefab override is not reset anymore when prefab is pasted as a child. (1339266)

  • Graphics: Fixed a renderingLayerMask issue with terrain tree rendering. (1324480)

  • Graphics: Fixed an issue where a Single Channel Texture2DArrays had a corrupted mips when using Box mip filtering. (1352547)

  • iOS: Fixed an issue where a presentation controller dismissal resulted in black screen when allowed orientations were changed while it was showing. (1304313)

  • iOS: Fixed an issue where Analytics temporary data was stored in a user accessible folder. (1211659)

  • iOS: Fixed an issue where Bluetooth keyboards did not handle the input outside of text entry. (1355543)

  • Linux: Fixed issue where dismissing a context menu can cause a crash. (1347655)

  • Physics: Fixed an issue where "Physics2D.Distance()" always returned zero distance when an overlapped CapsuleCollider2D with a uniform (degenerate) size was used. (1354786)

  • Profiler: Fixed an issue where there was no error message when trying to load an old profiler data format and direct users to load the data in unity 2018.4. (1341972)

  • Shaders: Fixed a shader compiler crash when asked to compile a variant for a platform that is not installed. (1348875)

  • Shaders: Fixed a spacing issue when drawing material UI for Integer based enum properties. (1355315)

  • Shaders: Fixed an issue when Pass.CompileVariant silently accepted impossible combinations of ShaderCompilerPlatform and BuildTarget. (1348874)

  • Shaders: Fixed an issue where the Editor was nearly unusable when compiling heavy compute shaders in the background. (1348455)

  • Shaders: Fixed an issue where UI sliders only allowed end values for ranges with the left value greater than the right value. (1351151)

  • Shaders: Fixed count constant generating an error when compiling shaders for Vulkan using Pass.CompileVariant API. (1348871)

  • Shaders: Fixed Pass.CompileVariant not filtering keywords not relevant to the given pass. (1349218)

  • Shaders: Fixed Pass.CompileVariant throwing errors when compiling subshaders coming from the fallback or passes coming from UsePass. (1348862)

  • Shaders: Fixed ShaderData.Pass providing no way to check whether a particular shader stage is included. (1348880)

  • UI Toolkit: Drag and drop in ListView will not bind negative index. (1319543)

  • UI Toolkit: Fixed an exception in ListView when the page up key was pressed after hitting navigation keys. (1324806)

  • UI Toolkit: Fixed selection on pointer up on mobile to allow touch scrolling. (1312139)

  • UI Toolkit: Submit event on a ListView focuses in the content to allow keyboard navigation. (1311688)

  • WebGL: Added workaround for Safari IndexedDB bug. (1342163)

  • WebGL: Set the mouse position to be in the middle of the canvas if the cursor is locked. (1347311)

Changeset: f2d5d3c59f8c

Unity 2021.1.21

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