This mod provides a solution to the issue where one can see an extra pair of arms appearing in the MirrorDecor by quackandcheese when using a custom model from ModelReplacementAPI by BunyaPineTree.
Tested with Lethal Company v73, MirrorDecor-1.3.3 and ModelReplacementAPI-2.4.19.
With each switch in scene and whenever a mirror is bought or brought from storage, this mod will check if there is any mirror used in the scene, check for the camera used and update it to not show the extra pair of arms. Once done, the mod will idle until the next scene or mirror object is loaded.