even though it was shyt writing, I figured it was she had to kill him at that time during the ritual, after or when there isn't a ritual, all bets are off.
What's more
is that she supposedly felt chewie's presence once they got onto the ship
...but moments earlier she was distraught she might have killed him
..they can't even decide how her mary sue force powers work
and the film completely ignores that none of them idiots standing by heard another ship kidnapping chewie and taking off while she was force battling kylo simp.