Unreal Engine Issues
Unreal Engine Issues
bIgnoreAllPressedKeysUntilReleaseOnRebuild in Enhanced Input behaves unexpectedly during pawn possession
UE - Gameplay - Input - Jun 11, 2025This is a speculative bug report from the user. The fix for this is to re-do the work of 31224705 but in a better way. The "bShouldBeIgnored" flag is being overriden by the previous mapping's va ...
Assertion opening blueprint with HISMC created in 4.11
UE - World Creation - Worldbuilding Tools - Foliage - Jun 7, 2016After project was upgraded to 4.12 opening a blueprint that contains Hierarchical Instanced Static Mesh component will result in a crash. From the log I this is the important part: Assertion faile ...
Light leak on mesh when in shadowed area
UE - Graphics Features - Nov 8, 2017When Cast Shadow and Self Shadow Only in the Lighting Section of the Details of a mesh, the light will randomly hit the mesh even though it is in a shaded area. Light appears to flicker and will com ...
First four landscape tools are not accessible in VR Editor Mode
UE - Editor - Workflow Systems - Jan 8, 2018Tested in Oculus. Found in 4.18.2 CL 3794801, 4.17.2 CL 3658906. Not able to reproduce in 4.19 Main due to a crash upon launching VR Mode. Users are able to select any of the first four sculpt ...
Split screen causes rendering issues with lightshafts
UE - Graphics Features - Feb 21, 2018There is an issue occurring where Split screen causes rendering issues with light shafts. This issue does not occur if you use the command " r.lightshaftquality 0" The issue no longer occurs. This i ...
Unreal crashes when you connect scalar node to scalar input, when material function has a vertex interpolator
UE - Graphics Features - Mar 19, 2018There is an issue occurring where Unreal crashes when you connect a scalar node to scalar input when the material function has a vertex interpolator. This issue causes the engine to crash, but the i ...
Foliage Not Updating to Match New Landscape Height After Level Save-As
UE - World Creation - Worldbuilding Tools - Foliage - May 3, 2018I have observed this behavior in 4.18.3, 4.19.2, and Main (CL 4048405) Per User: I made a landscape, painted some foliage and saved the scene. After I saved the same scene under different name the ...
TPropertyValueIterator skips TMap values when KeyType is a UStruct
UE - Foundation - Core - May 7, 2018From https://udn.unrealengine.com/questions/431271/tpropertyvalueiterator-skips-tmap-values-when-keyt.html The property value iterator has logic where it tries to iterate over all properties in a s ...
Renaming a BP interface function/event breaks all existing uses of that function/event
UE - Gameplay - May 24, 2018If you rename a blueprint interface function or event that is used somewhere in a blueprint, it will break the usage of that function/event. If it was a function, it will actually delete all the BP ...
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 ...