Unreal Engine Issues
Unreal Engine Issues
Delete Unused Variables Does Not Remove Local Variables
UE - Gameplay - Blueprint - Oct 13, 2015Using the Delete Unused Variables option under the Edit tab of a blueprint does not remove local variables. Instead, it displays a "All variables are in use" error. Occurs in 4.9.2 and 4.8.3 binar ...
C# UHT fails to recognize delegates declared in another class's namespace
UE - Foundation - Cpp Tools - UnrealHeaderTool - Dec 14, 2022Repro Rate: 3/3 This issue occurs in the live build //UE5/Release-5.1 at CL 23058290. This issue has also been regression tested against //UE5/Release-5.0 at CL 20979098 and is confirmed to be a r ...
Crash when clicking "Reset to Default" button on the Details Panel for the MaterialAttributeLayers material node.
UE - Rendering Architecture - Materials - Jul 15, 2025This crash repros from at least UE 5.3 and up to latest. The following assert is hit: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 1067] Array index out of bounds: 0 in ...
Forward Rendering Lightmap Density view flicker
UE - Graphics Features - Aug 20, 2019The shaders flicker when in Lightmap Density viewmode after enabling Instanced Stereo Rendering in Project Settings > Engine > Rendering > VR Tested in 4.21.2 (CL - 4753647) 4.22.3 (CL - 7053647), ...
Using Fixed Frame Rate Increases the Speed of Auto Save
UE - Foundation - Core - Oct 26, 2015Using a lower fixed frame rate (i.e. 20fps) causes the auto save timer (when set to the default of 10) to count down in 3 seconds. Found in 4.10 Preview 2 CL 2733139. Reproduced in 4.9.2 binary an ...
WorldSettings Blueprint crashes editor when saved/compiled
UE - Gameplay - Blueprint - Feb 12, 2019Making a Blueprint instance of the AWorldSettings class, then saving/compiling instance Tested in 4.20.3 (CL - 4369336), 4.21.2 (CL - 4753647), 4.22 (CL - 4958363) ...
Placeable UCLASS specifier doesn't override parent classes NotPlaceable UCLASS specifier
UE - Foundation - Core - Jul 12, 2019When the child of an actor with the UCLASS specifier NotPlaceable has the UCLASS specifier Placeable it still isn't placeable. This behavior doesn't occur in 4.20.3. Found in 4.22 CL#7053642 Reprod ...
Replay playback does not start at 0
UE - Networking - Nov 9, 2021Replays start playing before the player finishes loading into the level. From the player's point of view the replay starts playing 3 seconds into the replay instead of playing at 0 seconds. The pl ...
Make Lidar Point Cloud Point Node has had the Location input change from a Vector to a Vector 3f
UE - Gameplay - Oct 12, 2022Tested in: //UE4/Release-4.27 CL 18319896 Input pin was of type Vector //UE5/Release-5.0 CL 20979098 Input pin was of type Vector 3f //UE5/Release-5.1 CL 22346211 Input pin was of type Vector 3f Th ...
Keep Simulation Changes Not Saving Values After Physics Simulation
UE - Gameplay - Blueprint - Oct 1, 2015Simulating your level and then attempting to use the Keep Simulation Changes option on an actor that has simulated physics gives the No Properties Copied error. Occurs in 4.9.2 binary and Main CL ...