I have also experienced random issues, for example when enabling MQTT. Just today I had to revert to an older firmware. I think I picked the oldest one from the website. It’s been running for about hours since then without issues.
I’m new to meshtastic so I’m only figuring out how to debug the device, read logs, etc. From the app and also from watching the LEDs it looked like it was restarting every ~20 seconds but that’s all I know.