Hmm, yeah that seems wrong. I don't get reboots on devices I use frequently; I think it is only supposed to kick in when the device is not in use for a long time (it is meant to stop police who have a locked device they will try to brute force into).
Are you on latest iOS? Are you stilllocking / unlocking the phone once in 3 days at least?
7 days timeout on was introduced in iOS 18, but then decreased to 3 days. I dont use this device physically - it's just a phone that always connected to power and sit on top of mac mini for debugging and running some ios exclusive apps.
And I honestly dont do anything remotely interested to the police to worry about it. Yet it all just worked and now it doesnt.
My physical ios device test harness has no pin numbers/touch id activated for any of the connected phones. I noticed early on in testing that it would require physical access to reinput the pin code even when the device was already unlocked when I would restart an XCUI test.
If you're able to have fully unlocked devices at your test setup I'd suggest giving that a shot to see if it fixes your issue around device restart.
