Dynamic Head Major Animation Problems + Validation issues (Animations Overlapping?)

I need some help with my body I’m intending on releasing to the market, Due to oversight on roblox’s part I couldn’t upload a robot style body that would have no realistic way of emoting or being expressive without looking wrong or just not making sense; I’ve decided to just put a small dynamic head onto the body from a Template body that I’m certain would 100% work and just release the head seperately as a hat but as I fixed everything up the only thing that stood in the way was the animation test,. It turns out the face just freaks out badly during the mouth ROM animation and just explodes into a huge mess of polygons for no reason which invalidates it
I’ve gone through about three iterations of this already and have not come across any solutions that work at all for me. The only thing I’ve possibly narrowed the problem being is that it seems that animations are played all at once during the test animation but all keyframes for the animation don’t ever go far off of the head at all which makes me think it’s overlapping all the animations all at once when it’s in studio??
I’ve triple checked everything to make sure I’m exporting at the right settings, Including the head parts since they include animation and their own assets.
I would like to know about other developer’s insights on this problem, Hopefully get a solution and I would like to at the very least glean some information about how dynamic heads are tested / function animation wise since even before my attempts to edit the animations it would explode downwards into really nasty long translations.
Here’s the head and body as it would appear in blender and as it is during the animation testing in studio including two videos that better show the problem


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Thank you for looking at my topic, I hope I can get some help with this