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Unity 6000.6.6f1

Released on Oct 15, 2026

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Known Issues in 6000.6.6f1

  • 6000.0.75f1: Player stops responding permanently when scenes are repeatedly switched with SceneManager.LoadSceneAsync (UUM-156125)

  • 6000.3.14f1: [Multiplayer Play Mode] Play Mode Scenario stays in the "Deploying" state when entering Play mode with an additional Editor instance and the Vulkan graphics API (UUM-154645)

  • 6000.5.0a5: “Overflow in memory allocator. UnityEditor.GUIView:ProcessEvent (UnityEngine.EntityId,intptr,bool&)“ pop-up warning when opening a specific scene (UUM-155070)

  • 6000.6.0a4: Silent crash when launching a project from an external drive with exFAT formatting (UUM-156738)

  • 6000.6.0a6: Hierarchy window stays empty when entering Avatar Configuration with the new Hierarchy enabled (UUM-155256)

  • 6000.6.0a6: Point Light 2D loses its Cookie when a project saved in Unity 6.0 or 6.3 is opened in 6.5 or newer (UUM-156931)

  • 6000.6.0a7: Crash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct (UUM-155957)

  • : Crash on DomainUnloadAutoFree::FrameMaintenance during Editor usage (UUM-144552)

  • : Crash on mono_log_write_logfile when more than one copy of bee_backend is running (UUM-142773)

  • : [WinEditor] Play Mode framerate drops significantly when moving the mouse cursor with high polling rate (UUM-142550)

6000.6.6f1 Release Notes

Fixes

  • 2D: Fixed ArgumentException when using overlay camera in 2D Renderer. (UUM-148111)

  • 2D: Fixed intermediate texture not created when requested by render pass. (UUM-145892)

  • 2D: Fixed LineRenderer not initializing correctly when toggling enable on game object. (UUM-147747)

  • 2D: Fixed NaN warning in sprite intermediate renderer. (UUM-147102)

  • 2D: Fixed Render Objects feature failing when depth buffer is disabled. (UUM-153342)

  • Android: Fixed freeze when relaunching GameActivity immediately after unload in UaaL mode. (UUM-149857)

  • Android: Fixed Target API Level not being properly selected from dropdown. (UUM-154841)

  • Animation: Fixed an issue where clicking in the "Edit Key" fields of the Animation Window curve view wouldn't deselect the text in the field. (UUM-140166)

  • Asset Pipeline: Fixed a crash when opening a project that contained a manager asset holding an object of the wrong type. (UUM-153271)

  • Asset Pipeline: Fixed an issue where the Editor could crash during a domain reload or on quit while asset previews were loading. (UUM-141036)

  • Editor: Fixed a MissingReferenceException that the Inspector logged on Play mode exit when it was scrolled down and showed a Volume component. (UUM-153587)

  • Editor: Fixed GameObjects with HideAndDontSave hide flags not disappearing immediately from the Hierarchy window when the flag was changed through an Inspector property edit. (UUM-150345)

  • Editor: Hierarchy no longer shows as empty when returning from editing a nested prefab to it's parent, after the parent prefab was edited on disk. (UUM-154347)

  • Editor: OnCodeLoaded Scripting API documentation updated. (UUM-155081)

  • Entities: Fixed an issue where rebuilding an unchanged project produced different content archives, causing published remote content to be downloaded again. (UUM-151571)

  • Entities: Fixed an issue where the authoring representation of an object would be shown instead of the runtime representation, when selecting the object through Entities Hierarchy. (UUM-152665)

  • Entities: Fixed GameObjects in an open SubScene disappearing from the Hierarchy window after the SubScene GameObject was disabled and enabled. (UUM-154731)

  • Entities: Fixed the entity list foldout under a SubScene in the Hierarchy collapsing after an undo of reordering or reparenting SubScenes. (UUM-147837)

  • GI: Fixed Editor crashes when building a GPU BVH from an empty primitive span or with a maxLeafSize of 0. (UUM-154597)

  • Graphics: Screen.currentBackbufferMSAASamples on Android Vulkan now correctly returns the MSAA sample value of the back buffer.

  • IMGUI: Fixed the text cursor being vertically misaligned in an empty text field. (UUM-145875)

  • macOS: Fixed a crash on recent macOS versions that could occur when importing X.509 certificates. (UUM-154511)

  • Scripting: Fixed an issue where opening the Standalone Profiler could trigger a script compilation in the Profiler process, which logged "Could not find a part of the path" errors for package assemblies. (UUM-133483)

  • Source Code Build: Fixed Editor source builds failing on machines that use the Turkish region format. (UUM-154501)

  • SRP Core: Fixed rendering corruption when using async compute with Render Graph, where a texture could be used from both the graphics and compute queues simultaneously. (UUM-141896)

  • Text: Fixed an out-of-bounds memory read when a TextMesh or legacy UI Text string ended with an unterminated quad tag parameter. (UUM-153129)

  • Text: Fixed an out-of-bounds memory read when a TextMesh or legacy UI Text string ended with an unterminated rich text tag. (UUM-153128)

  • UI Toolkit: Fixed a NullReferenceException in the Inspector when saving a UI Toolkit element animation while the Animation window is in Preview mode. (UUM-155268)

  • UI Toolkit: Fixed a NullReferenceException when a z-index child inside an element rendered through a render texture had an ancestor whose scale changed from 1. (UUM-152805)

  • UI Toolkit: Fixed an issue where undoing the deletion of a selector in the Style Sheets window restored it at the wrong position. (UUM-149380)

  • UI Toolkit: Fixed blurred text and content in elements with a filter, such as drop-shadow, when the panel scale is not a whole number. (UUM-155009)

  • UI Toolkit: Fixed element animations playing in the Game View while the Editor is in Edit Mode. (UUM-148584)

  • UI Toolkit: Fixed elements with a 3D rotation or Z offset disappearing on overlay panels when they are rendered through a dynamic or group transform. (UUM-145649)

  • UI Toolkit: Fixed elements with the GroupTransform usage hint, such as a ScrollView content container, rendering at the wrong position and logging an assertion after an ancestor's scale changed from 1. (UUM-152805)

  • UI Toolkit: Fixed instable UGUIEventSystemTests on WindowsEditor. (UUM-143303)

  • UI Toolkit: Fixed multi-column list and tree views requiring Ctrl+click instead of Cmd+click to sort by multiple columns in Web builds running on macOS.

  • UI Toolkit: Fixed SliderInt thumb position, dragging, keyboard stepping, and value display when the slider range uses values near the minimum or maximum integer limits. (UUM-154562)

  • UI Toolkit: Fixed the action key of pointer, mouse, keyboard and navigation events being Ctrl instead of Cmd in Web builds running on macOS. (UUM-153940)

  • UI Toolkit: Fixed the Dynamic Atlas Viewer showing no atlas after the UI Toolkit Debugger window was recreated, such as when maximizing and restoring a docked window or toggling UI Toolkit Live Reload on the debugger. (UUM-150663)

  • UI Toolkit: Fixed the Editor and Players hanging when a USS transition-timing-function declaration uses a value that is not a keyword, such as 5px. (UUM-155159)

  • UI Toolkit: Fixed the Gradient Editor clearing the redo history and adding an empty Modify Gradient undo step when it closed after an undo. (UUM-153510)

  • UI Toolkit: Fixed the Select GameObject window silently ignoring Prefab picks in a second Inspector after swapping between Prefabs with different components. (UUM-154149)

  • URP: Reduced back buffer memory and bandwidth on platforms with a multisampled back buffer including Android, iOS, and Metal. The back buffer remains single-sampled in frames where no camera renders MSAA directly to it, for example a camera that resolves MSAA from an intermediate texture. MSAA results are unaffected. (UUM-134600)

Package changes in 6000.6.6f1

Packages updated

Changeset: d20c9ac777da

Third Party Notices

For more information please see our Open Source Software Licences FAQ on the Unity Support Portal

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