First person 'falling arms' glitch

[tizerist]

https://www.youtube.com/watch?v=5UE2rpBOxVk

The glitch happens in the first couple of seconds of the video, where the players arms 'fall' from the top of the screen. I have loads of mods installed, and can't work out which mod does it, as it happens rather infrequently, making it very hard to pinpoint what is causing it. If anyone else has this glitch perhaps we can narrow it down to a particular mod.

My mod list is here: http://pastebin.com/dpx37UHP

User kkarE also has this glitch, and we also have a similar amount of plugins: 119-129. Also it only appeared to happen from 2015 onward, with 2-handed weapons. This is not 100% concrete however.

Any help appreciated.

[sesom]

What happend before the falling arms? It looks a lot like the typical character dropping in (where the xmarker is set to high when the character is moved to the worldspace from somewhere else) to me.

[tizerist]

Sesom, just walking about. Can randomly happen when roaming around with weapon drawn. And it normally happens 2 or 3 times in a row quickly, hence me capturing the last 'fall' on my phone.

[sesom]

My guess is in direction of skeleton or animation replacers then.