Dog has major anxiety with dog gate!

Hello All,

I came home today and my dog chewed the rails of the newly installed wooden dog gate. The thing is, she doesn't have any issues being alone if a gate is not up. We have another dog and plenty of dog/chew toys as well so I know she is not bored.
The gate has been up for 3 days or so, and we had been closing it while at home to slowly introduce her to it. We have gated them a few times within the past few days while gardening and had no issues. We have left once or twice for ten minutes, and again... nothing has happened. However today we were gone for about 45 min. and she tore it up.
We have had trouble in the past trying to gate her out of the bedroom at night. She was able to see us in bed but still had issues-- basically she broke those gates by running through them.
I can only assume she has had past trauma with gates and/or it is triggering her to remember the time she spent in the shelter while caged up.
Any advice? We really want to keep the dogs out of bed at night and also want to keep them gated to a certain area when gone.