that is Canon Crew Fix as it came out on BCFiles or with changes?
I'm almost sure what file to search, but I'd be giving you the solution for a stock CCF mod.
if it's edited, you'll have to reinstall it and edit it again.
EDIT: I kinda found something.
in Miguel's stock config file, it calls Bridge.CommonAnimations.HitHardStanding which loads the animations that are used for both Miguel and Brex (both are standing, behind the captain).
if that line is still there, in CCF it will be still calling the animations for a standing position.
Miguel is now seated, so I think it's not loading what it should load.
what puzzles me is that Felix was seated, and worked. now it's standing and it also works.
that's where i got lost.