Welcome to the forum. Your window is the first I've heard of popping out. There have been reports of the glass front windows shattering and cracking while the trailer is parked. Do you have the older glass, non-opening, window or the new acrylic plastic window that opens?
Here is the service contact for your region at R-Pod:
Katlyn Mabie
(574) 642-3119
kmabie@forestriverinc.com
That contact info can be found under Service on R-Pods website
Here.