Unreal Engine Issues
Unreal Engine Issues
The 'Set Constrained Components' node doesn't set the physics constraint components correctly if used in the Construction Script
UE - Simulation - Physics - Jan 20, 2015The 'Set Constrained Components' node doesn't set the physics constraint components correctly if used in the Construction Script. ...
Subobject components do not have undo functionality within the level
Tools - Jan 4, 2021When moving these components around in the world editor, the transform gizmo will move with the undo, but the actual component will not. I could not repro this behavior with non-native component ...
Game projects that rely on legacy include paths are not compatible with Blueprint nativization.
UE - Gameplay - Blueprint - Nov 10, 2018Using legacy-style #include paths in a game project is allowed by UBT by default, but it's currently not compatible with Blueprint nativization, as it does not account for this possibility. Current ...
[Submix][Recording] - Existing Sound Wave to Overwrite option has no effect
UE - Audio - Submixes - Jul 29, 2021This is an old bug that looks like it never made its way into JIRA. Adding for documentation. ...
Retargeting Pose From Mesh Does Not Retarget With Source Mesh Component and Skeletal Mesh Variable Types
UE - ACT Character - Retargeting - May 11, 2022Occurs 5/5 times *Regression *does not occur: No Retargeting Pose From Mesh node in //UE4/Release-4.27.2. Retarget Pose From Mesh node does not retarget when used with Source Mesh Component and Sk ...
Lumen Global Distance Field Trace Leaking due to Surface Cache Sampling
UE - Rendering - Features - Jan 12, 2026At specific distances from a thin wall, surfaces inside of a sealed chamber can receive indirect lighting from outside, leaking light into the chamber. This appears to be due to how SWRT handles sa ...
"Scale for <ComponentName> has a component set to zero, which will result in a bad body instance" warning spam when moving actor instance even with Collision Profile overriden to "NoCollision"
UE - Runtime - Simulation - Jan 12, 2026When a StaticMeshComponent has a scale component of zero in WorldSpace (after accumulating with the hierarchy from the root to it), function UPrimitiveComponent::OnCreatePhysicsState() logs the warn ...
Unable to dynamically load an animation blueprint in a packaged game
UE - Gameplay - Jul 27, 2015Dynamically loaded animation blueprints do not work within packaged product. Download the pre-made project from here: [Link Removed] ...
A crash can occur when multiple Actors are spawned/destroyed simultaneously with each one loading an asset.
UE - Foundation - Core - Jan 6, 2017A crash can occur if multiple Actors are spawned/destroyed simultaneously, with each Actor loading an asset when it is spawned. This does not occur 100% of the time, but it does occur quite frequent ...
[Sound Submix] - Dry Level of a Submix is calculated differently whether or not there is an effect in the chain
UE - Audio - Submixes - Jan 21, 2021There is a discrepancy is how the output volume of a submix is calculated when the effect chain is and is not populated. When there is no effect on the submix, the Dry Level adds additional gain to ...