Probably a bug on the rendering side. When observing the ACs work in action, I noticed that some arms just pop into existence. I started recording and then watched it frame by frame. And they certainly do.
The arm to the right just appeared in this state (previous frame: no arm), at 0:23. Many more appeared in less-distant position.
03-06-2025, 17-19-45.png (131.3 KiB) Viewed 315 times