Unreal Engine Issues

Lightmass Build Hanging at Specific Percentages

Lighting will build indefinitely in certain circumstances and can be verified in Swarm Agent that it will continue to process the maps even though the log shows it has completed. This is happening i ...

Editor crash while saving asset during cook operation

It is possible to experience an editor crash in 5.5.4 when the cook process generates a warning that references an asset while the editor is saving. It seems that during a save operation, the code t ...

Unable to zoom in on a BP graph in VR Mode

I am unable to zoom in on the BP graph with the Oculus touch controllers. If I have the graph focused and I pull back on the thumbstick or press the thumbstick down then I can zoom out. This issue d ...

Different Number of Frames imported from the same FBX between UE 4.8 and 4.9

Using the same import settings in UE4.8 and UE4.9 will result in a different number of frames of an animation being imported from the same FBX file. If you import the same fbx animation which in M ...

Layered blend per bone node with blend mask setting in an animation BP will not work after restarting UE editor, until recompiling the anim BP manually.

BP Component breaks GPU Collision

When an Arrow Component is added to a blueprint and made visible in Game, a GPU Particles collision will fail until the arrow component is outside the Camera Frustum or turned back to hidden in game ...

Soft Object Pointers may not fire Rep Notifies

User reported that Soft Object Pointers may not fire RepNotifies properly. This is likely also the case with Weak Object Pointers (and other similar wrappers). The main problem is that these all ge ...

CPU Particles spawned through Blueprints do not keep Collision

Particle Systems spawned via a blueprint are not generating collision. The same system will generate collision if placed directly in level. Also reported: https://answers.unrealengine.com/questio ...

Lightmass Build Hanging at Specific Percentages

Lighting will build indefinitely in certain circumstances and can be verified in Swarm Agent that it will continue to process the maps even though the log shows it has completed. This is happening i ...

Disable button style is not applied when a button is disabled

If the user applies a material or texture to the disabled button style option the button will not used the material/texture that was used but will instead use the default grayed out button look. E ...