[Q] Reboots into recovery after 15 seconds
My rooted 1st gen fire started rebooting itself into recovery this evening. It boots normally, but after ~15 seconds, whether I leave it on the lockscreen or am in an app, it goes through the normal Powering Off sequence and boots into TWRP. KFU reports boot status 4000, although it obviously switches to 5001 during the reboot.
No new apps have been installed in a while.