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 ...
Can't set "r.Shaders.Optimize" to false in UE5.4
UE - Rendering Architecture - Shaders - Jun 7, 2024The CVar "r.Shaders.Optimize" cannot be set to false from DefaultEngine.ini in the section "[ShaderCompiler]" as its help text describes. Also tested on UE5-Main, CL: 34200103 ...
Actor components in blueprintable structs are uneditable in full BP editor, but not on instanced actors or in data BP editor
UE - Gameplay - Blueprint Editor - Jan 24, 2024When an actor has a blueprintable struct that contains a reference to an actor component and that component is created default in the actor's constructor, the struct and the component will be unedit ...
Reflection Captures permanently unload with world streaming
UE - Graphics Features - Jul 19, 2024When a reflection capture is unloaded due to streaming, it cannot be reloaded when the player returns to that area in the world because FReflectionCaptureData::OnDataUploadedToGPUFinal deletes the C ...
Duplicated PCG Component instance resets overridden parameters to default
UE - World Creation - Procedural Tools - PCG Component - Jun 4, 2025Context: Similar to parameters in the Material editor, PCG Graph Parameters are user created overridable values and can help create customizable graphs for a variety of situations. Problem: The l ...
Double Properties break reset to default and inherited value propagation
UE - Gameplay - LWC - Apr 13, 2022This is an issue with how FPropertyValueImpl::ResetToDefault works: it uses GetDefaultValueAsString to reset the default value. This is problematic because the LexToString function that is eventuall ...
A disabled Niagara component is respawned unexpectedly by scalability system in some edge cases
UE - Niagara - Scalability - Oct 17, 2023Even after manually Deactivating a Niagara component, this Niagara component may be revived under certain conditions. This issue occurs when the following conditions are met before the Deactivated N ...
Compiling Blueprints breaks socketed attachments of actors attached to non-root components
UE - Gameplay - Blueprint - Oct 12, 2023When blueprints are compiled, instances of those blueprints have their attachments detached and then reattached. Reattachments always occur on the RootComponent regardless of which component they we ...
Foliage rendering issues when using both Density Scaling and MaxWorldPositionOffsetDisplacement
UE - World Creation - Worldbuilding Tools - Foliage - Aug 29, 2024When a material with WPO effects and MaxWorldPositionOffsetDisplacement is applied to a foliage mesh, foliage applied to a map will no longer work as expected with density scaling, especially after ...
When moving actors to the current level, their label is reset and displayed incorrectly on the Scene Outliner until the next time it is refreshed
UE - Editor - Workflow Systems - Jul 14, 2025This is a regression, it worked correctly up to UE 5.4, but repros on UE 5.5 and 5.6. Also, this seems related to [Link Removed], which was fixed by CL 40649716/40649749 and integrated into UE 5.6, ...