Kinda of an annoying bug, it has nothing to do with separate animation files being in sync or anything. My arms are just one animation file yet somehow they are out of sync in unreal, or unreal is just adding some simulated weight to one of the arms? I don’t really know. Regardless I’ll try to provide some clips to show what is happening.
It’s especially noticeable around the 60th frame in my animation for the arms.
Here is a video showcasing the issue:
