I was playing the new night time showcase with the dev build, and I went up to the lighthouse to plant explosives, and there was a group of AI standing around a fire. I saw them from afar and went up closer to see them better. When I got close enough, I noticed they were "dancing", but I realized they were stuck in some kind of animation loop. I got closer, and my character started to do it as well. It looked like the switch weapon animation was bugging out. Anyways, I backed off, and my guy stopped "dancing", but the AI continued. I realized that once I got within a certain distance, my guy started "dancing" along with the AI. This was not the first time this happened, however.
I have a recording from a while ago that I recorded form a multiplayer game. I didn't submit this bug then, because I thought it was an issue with a mod or unofficial script or something, but now I see it was something with the game itself. I have no mods installed or scripts running when I played the Night Showcase(or ever).
PLEASE VIEW VIDEOS LINKED BELOW- I recorded both times this happened.