I wrote down all reboots since installation of update 1.3.6 (2016-05-23, 21:32). I wrote down date/time, Wi-Fi and Bluetooth status, used app, background apps (not services), crash type (instant reboot, hang and reboot, reboot while not in use), later (since 2016-06-04 21:50) also if it was connected to the charger or not.
_ * = not experienced live, only seen PIN dialogue
2016-05-26, 02:44
2016-05-26, 06:15*
2016-05-26, 06:17
2016-05-28, 03:02
2016-05-28, 10:37
2016-05-28, 10:46
2016-05-28, 20:51
2016-05-28, 21:41
2016-05-29, 20:03
2016-06-03, 06:10*
2016-06-03, 15:28
2016-06-04, 09:47*
2016-06-04, 21:50
2016-06-05, 01:37
2016-06-05, 09:26
2016-06-05, 10:09*
2016-06-05, 10:16
2016-06-06, 05:02*
2016-06-06, 19:12
2016-06-06, 19:19
2016-06-07, 23:27
2016-06-11, 12:23
2016-06-11, 21:21
Notable is that there were long times without any crash:
May 24-25
May 27
May 30-Jun 02
Jun 08-10
At other times, the FP2 crashes twice within 10 minutes.
All crashes (except 2016-06-03, 15:28) occurred at home while connected to the Wi-Fi. All crashes since 2016-06-04 21:50 occurred while connected to the charger. But there were earlier crashes while not on the charger.
The location switch was permanently on, so GPS can be used anytime.