The jaw strength! mine gives up if i pull even remotely hard

My girl 7 months does the same exact thing. No issues with the crate ever until its shut. I can't figure out if it's separation anxiety or confinement issues she has. I've tried putting the crate right next to me on the couch and she still will do it so I'm leaning towards confinement? Hopefully someone will share their secrets. @tanza did you use crate games, just leave them in there until they calm down, puppy pen with crate in it? She climbs the pen to try and escape and has ended up hurting herself. Feel like i've tried everything and nothing worked. Maybe I'm just not sticking to it enough. The wife is a teacher so she's been able to be home with her but I'm a tad worried for when school starts back up