@tarkzim I also have some random reboot into fastboot mode and I still don't know what triggers it, cause it's really random (sometimes just lock/unlock the device, or going into settings, or open a new tab in Firefox etc.).
Sometimes it just normally reboots instaed.
Another bug i found is that WiFi sometimes disconnects and never connects again, saying "unable to connect to the network", even if I delete and insert the password again (btw i use 5GHz WiFi). i need to reboot the phone for making it works again, but it's comes often even after reboots. On 2.4GHz seems to be pretty stable.
I'll try to take logs for you.