Unreal Engine Issues

Curves in compressed additive animations interpolate incorrectly when two keys in a row have the same value

Curves compressed from additive animations will not interpolate correctly if they have two keys in a row with the same value. The second key will be ignored, leading to the curve interpolating earli ...

Modifying FinstancedStruct (Blueprint structs) properties inside another FInstancedStruct triggers an ensure and properties do not get saved.

There is a bug with Blueprint structs having FInstancedStruct as a property. If you modify the DefaultValues of any property of an FInstancedStruct inside the blueprint struct asset, an ensure will ...

Uassets names retain their original case even if changed

When a uasset is renamed it does not appear to take into account case changes. If the asset is renamed in the editor to the same name with different casing, the asset as seen in the file directory w ...

Pressing Ctrl+Shift+F in UMG designer mode will pop up a new tab named (unrecognized tab)

Collapsing a local variable Get/Set node into a new function or macro will result in a BP compile error.

We currently overlook local variables being collapsed into new function and/or macro graphs, where they are no longer in scope. Current workaround: Manually delete local variable "get" and "set" no ...

Material functions using Vertex Interpolators called by multiple function nodes will only use the final interpolator result

The interpolator in each function call does correctly compile it's input to a temporary, but as there's only one actual expression node, each call stomps the temporary data so the final CompileInput ...

Actors which do not have a custom actor factory implementation will not get their preview setting set on drag/drop from content browser

Audio Does Not Play Back Correctly when entering an Audio Volume with a Submix Send that is PreAttenuation with a Submix using Convolution Reverb

Entering an Audio Volume that has a Submix Send set to Pre Distance Attenuation and using a Convolution Reverb causes severe audio glitching. Does not occur if Send is Post Distance Attenuation. Doe ...

Component name conflict when reparenting from a blueprint parent to a native parent causes data loss and component pointer to be null.

Reparenting a blueprint from a blueprint to a native class will cause data loss if both parents have a component with the same name. The component ptr will always be null after reparenting. Expected ...

If "Update Position Eash Frame" of "Skel Vert/Surf Location" is enabled, the particle continues to rotate.

It seems to have occurred since UE4.23, and the cause was the following part of "ParticleModules_Location.cpp".//From UE4.23 if (bOrientMeshEmitters) { //We have the mesh oriented to the normal o ...