Animation incorrectly offsets left arm

I have a animation for a gun (dont mind the model) however whenever I play it in studio the left arm is offset to the right. Is there any easy fix for this (is it a known issue or something complicated related to my game).

Information:

  • Gun is linked to right arm through Motor6D and is part of animations
  • All other animations are default and do not affect the arm
  • There are no known scripts that affect the arms or other rig parts

I have tried remaking this animation and it still has the same issue.
Attached are screenshots of (1) Animation editor and (2) how it looks like in-game.

NoBug
Bug