Strange animation bug after attacking with weapons

[Jambo]

So, I can't really describe this better than this video I took: https://files.catbox.moe/l9wa6m.mp4

 

After attacking with a weapon while moving, no matter what kind, my character just kind of freezes up for a second before going back to the regular running animations. I wasn't like this two days ago. The only thing that changed in my load order is I installed the full Osex and Ostim suite of mods. I've tried disabling CGO, reinstalling it, reran Nemesis like 10 times. Just kinda lost at what to do. Anyone had this happen to them too?

 

*Yes, I am using custom attack animations, but those aren't the problem. It happens with or without them enabled.

Load order:  Pastebin.com

[Jambo]

UPDATE:

 

Through immense trial and error, I found the cause, but not how to fix it. The 1hm_behavior.hkx generated by Nemesis causes this weird animation bug. When I remove it from the meshes folder, it no longer happens. If I enable CGO, the bug persists, but when I remove its own 1hm_behavior.hkx, it also fixes it. Same for AGO.

 

I've used both mods for over a year before this bug appeared on my latest playthrough, and I'm not sure why it's doing it now.