Dynamic head rig gets messed up upon import?

In blender, the dynamic head is set up fine.
The bone hierarchy is good and there isn’t any problem when playing the FACS poses:


However,

the facial animations suddenly are really messed up when I import it. It seems like the upper eye is moving as the mouth and vice versa, from what I can tell.

I’ve tried reimporting with different settings but nothing seems to change it.

If anyone knows why this happens or how I can fix it, please share!!

Thank you!

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