Unreal Engine Issues
Unreal Engine Issues
Attempting to Open a Widget Blueprint With Animation and Timeline Panels Hidden Causes the Editor to Crash
UE - Editor - UI Systems - Nov 11, 2015When you attempt to open a widget blueprint when you have hidden the animation and timeline panels, the editor will crash. There is a workaround: Window->Reset Layout will allow you to open the blu ...
Camera Movement is laggy while the mouse button is held down and ShowMouseCursor is enabled if there are AI moving
UE - Gameplay - Dec 15, 2015Camera Movement is laggy while the mouse button is held down and ShowMouseCursor is enabled if there are AI moving. Stat Scene Rendering didn't show any jumps while moving the camera under these cir ...
[AI] Debug Render Scene Proxy hits ensure for registering a delegate twice during level streaming.
UE - AI - Debugging - Aug 31, 2022Description from licensee: We're seeing an ensure get tripped up in FDebugRenderSceneProxy that says "DrawDelegate is already Registered!". Debugging the issue, we have confirmed that the DrawDeleg ...
ScreenPosition material node outputs upside down ViewportUV when launching on android
UE - Graphics Features - Aug 28, 2018ScreenPosition UV upside down on mobile. From User: "I believe the editor mobile preview provides "correct" results, while the mobile device produces upside down results. I ran into this issue w ...
Direct Capsule Shadows with Point Lights also project shadow on opposite side and direction
UE - Graphics Features - Dec 14, 2016When using a Direct Capsule Shadows on a skeletal mesh with a Stationary Point light, depending on the point lights placement, light source radius, and nearby surfaces will cast the shadow on the op ...
Sound Cues with Attenuation 'Override' Nodes break when Upgrading project to 4.11
UE - Audio - Apr 5, 2016When upgrading a project to 4.11, Sound Cues placed in the level with the 'Attenuation' override node no longer playback as expected. This issue was a bit weird when testing because the user report ...
[CrashReport] Assertion failed: !PinRef->bWasTrashed | UEdGraphPin::SerializePin()
UE - Gameplay - Blueprint - Aug 29, 2017This is a common and longstanding crash that has occurred since at least 4.15 and affected nearly 500 users. The CrashGroup was previously linked to [Link Removed], but that had specific repro step ...
Typo in "BaseEditorSettings.ini": under section [/Script/UnrealEd.ContentBrowserSettings], key "DisplayPluginFolder" (singular) should read "DisplayPluginFolders" (plural).
UE - Editor - Oct 11, 2025File "<ENGINE_PATH>/Engine/Config/BaseEditorSettings.ini" contains the following setting: [/Script/UnrealEd.ContentBrowserSettings] ; Whether to display the game project plugins in the Content Brow ...
WorldPartition RuntimeHashSet: non-deterministic URuntimePartitionPersistent UObject name causes unstable Cooked output (RuntimePartition:DebugColor)
UE - Engine Scaling - Streaming - HLOD - Jul 9, 2026During deterministic Cook / Package validation, the Cooked output of a WorldPartition map was found to vary non-deterministically between Cook runs. Diff detected in the DiffOnly Cook log:Serialize ...
RemoteToolChainPrivate.key permissions issue with Microsoft account Windows users
UE - Platform - Mobile - May 14, 2020Also have attach that exact RemoteToolChainPrivate.key file Logs when attempting to launch TM-ShaderModels Error:[Remote] Using private key at C:\Users\varun\AppData\Roaming\Unreal Engine\UnrealBu ...