Unreal Engine Issues
Unreal Engine Issues
Unable to package for Android with bEnableExceptions set to true
UE - Platform - Mobile - Jul 31, 2018Packaging for Android fails if bEnableExceptions is set to true. The errors are in the log file attached below. Regression?: Yes This did not occur in 4.19.2 ...
BeginPlay not called for Post-Process Anim Instance
OLD - Anim - Oct 29, 2019Post-Process Anim Instances do not have BeginPlay called. The proposed fix is to addif (PostProcessAnimInstance) { PostProcessAnimInstance->NativeBeginPlay(); PostProcessAnimInstance->Blu ...
Sequencer particle toggle tracks evaluate one extra frame
UE - Anim - Sequencer - Jul 1, 2020It looks like particle toggle tracks use TimeRangeToNumberRange which gives the incorrect range as a result of CL 10893518 which fixed [Link Removed]. ...
Deterministic cooking issue caused by ParticleModuleTypeDataGPU
UE - Niagara - Jan 18, 2021This problem is similar to the following case. [Link Removed] [Link Removed] It seems to have been fixed in 4.16, but the licensee reported it in 4.25. ...
OpenXR Thumbstick Up/Down/Left/Right Input Actions do not fire
UE - Platform - XR - Sep 1, 2021OpenXR Thumbstick Up/Down/Left/Right Input Actions do not seem to fire. I tested on Quest 2, but it sounds like the problem may be all of OpenXR. ...
Adding Regular Expression information to the project.build.cs no longer works
UE - Foundation - Cpp Tools - UnrealBuildTool - Feb 23, 2022This worked in previous releases, but changed around 4.27.2 and Early Access. This prevents users from using C# regular expressions. ...
Can't connect Date Time and Time Spawn pins to math nodes
UE - Framework - Blueprint Editor - Feb 2, 2023we can do a "cheap fix" here by adding the "IgnoreTypePromotion" metadata to the date time functions, but there are some underlying issues with the FindBestMatching func in this case causing it to f ...
Camera set to Projection Mode Orthographic doesn't appear to be rendering Sky Atmosphere
UE - Rendering - Architecture - Sep 13, 2023This is a regression. Tested in //UE5/Release-5.2 CL26001984 It appears Sky Atmosphere isn't rendered by a camera with projection mode set to Orthographic. ...
Crash when double clicking on RowStruct's CurveEditor
UE - Editor - Mar 15, 2024This problem can be reproduced with UE5.3 even after applying fix [Link Removed] Closed . We have verified this issue with U ...
Initialization error when creating FEventReply objects from Python
UE - Editor - UI Systems - UMG - Nov 28, 2025the handled value passed to unlock_mouse is actually treated as unhandled, because FEventReply has no uproperty and no Identical()function of its own. Adding WithIdenticalViaEquality can fix this is ...