Unreal Engine Issues
Unreal Engine Issues
Sequencer does not save asset variables in event struct
UE - Anim - Sequencer - Jul 31, 2018When adding a struct to a keyframe, Object Reference variables are not saved and Soft Reference variables are saved sometimes. Opening a keyframe's properties when the selected struct has an object ...
Crash caused by Buffer Overread in TBitArray operator < function
UE - Foundation - Core - Aug 29, 2018A licensee has reported a crash that is caused by a Buffer Overread in TBitArray's operator < function. While the licensee did not provide reproduction steps, the crash is apparent from looking at t ...
Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21
UE - Graphics Features - Mar 19, 2019According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...
D3D12RHI keeps increasing uniform buffer memory with "stat RHI"
UE - Rendering Architecture - RHI - Oct 25, 2019If any skeletal meshes are not displayed, it stops increasing. Allocation count of uniform buffer is stable. added on February 26 Followings are an additional information from licensee. FD3D12 ...
Ribbons Don't Follow Their Source Particles When Scaling
UE - Niagara - Mar 23, 2020When Ribbon Data in a particles system that is following is scaled in an instance the ribbons scale appropriately, but they don't follow updated location of their source particles. See the attached ...
Launching Android project to device results in Assertion Failed: AsyncLoading.cpp, Line 3710
UE - Platform - Mobile - Aug 31, 2020After updating to 4.25.1 from 4.25 Packaged Android game crashes constantly with objects added to the map 4.25 Packaged game did not crash (editor did a lot but glad thats fixed in 4.25.1) Empty map ...
Replacing a UI widget element and then undoing it causes the Widget Blueprint's UI elements to be deleted on editor restart
UE - Editor - UI Systems - Jan 25, 2021When using the Replace With option and then undoing it, upon engine restart the Widget Blueprint's UI components are all removed from the Widget Blueprint. It seems the undo is crucial to the issue, ...
Compile on load crashes for classes within an abstract class
UE - Gameplay - Blueprint Compiler - Feb 20, 2021When compiling on load in -game, a blueprint class that inherits from a native class that is marked within and the class that it is within is abstract, a crash will occur when FBlueprintCompilationM ...
Incorrect volume bounds check in FTranslucentLightInjectionCollector::AddLightForInjection
UE - Graphics Features - Apr 8, 2025The 'VolumeBounds' array in FTranslucentLightInjectionCollector::AddLightForInjection is accessed as a pointer instead of with 'VolumeCascadeIndex' and thus fails bounds checks for the outer volume. ...
BSOD when launching Twinmotion on NVIDIA 50-series GPUs with 576.02 Drivers
TM - Rendering - Apr 22, 2025Reported from multiple users. NVIDIA RTX 50-series GPU users are reporting BSODs when attempting to launch Twinmotion with the latest drivers installed. The crashes occur on the 576.02 driver versi ...