Video not turning out exactly as in Sequencer

Hi,

I’m trying to make a video with a character with a skeletal mesh, however, the animation is not turning out as I would like it to be.

I have a Metahuman head attached to a non-Metahuman skeleton, both with their individual animations (lip sync and body movement, respectively) playing in the Sequencer. After adjusting some settings, I get the head to stay in the character’s helmet. I then export the Sequencer file, however, in the exported video, the head becomes out of place (i.e. moves out of the helmet). How do I make the animation as seen on the camera identical to the one rendered to video?