Should I be concerned?

[Aceroller]

Last night I plugged my 6S in before bed with approx. 30% battery left. When I woke up this AM and unplugged it, I had to type in my passcode (no Touch ID) because it said the phone had re-started? The phone was at 100% as usual though. Has this happened to anyone else? Just checking. Thanks.

 

[citivolus]

This has happened to me as well with my 6S Plus. No idea why.

 

[Newtons Apple]

Several have reported the same thing. I have the S+ and so far mine has not done this.

 

[IphoneIssues]

Happens to me too.

 

[Aceroller]

I guess no harm or foul seeing as it charges up to 100% like it's supposed to. Just hope it's not the start of some larger problem.

 

[Knowlege Bomb]

This has been happening to me and I had attributed it to my jailbreak.

Interesting to hear it's happening to stock iPhones.

 

[Vundu]

Happened to me once. Not since going on iOS 9.2 betas though.