Sonim XP8 Hotspot connectivity issues

I'm experiencing some issues setting up my Sonim hotspot. Nobody's able to use the Internet when connected to it no matter what settings I use. The hotspot itself is incredibly finnicky and somwtiimees turns itself off. If I'm unlucky, it gets stuck in a loop of constantly turning itself on and off slowing the phone down to a halt and making it unresponsive.

I'm current using the AT&T monopoly-locked (can't use a different provider on SIM 2) variant of the phone on Android 10. I'm contemplating trying to find a way to downgrade this thing back to Android 8.1 in hopes that it'll resolve the issue. I'd appreciate some pointers here..