Sometimes when I turn on the camera app it freezes on the first screen for about 4-5 seconds. It happens every 3-4th opening of the app. Was the same on 9.1 and now on 9.2.
Is it possible that it behaved like that because i turned it on the first time after phone reboot ? Was thinking about it now and that might be when it was getting the lock up.
If this only happened once, it could be from a whole variety of reasons. If this is a consistent and persistent thing, then I would suggest doing a restore as new. I would suggest keeping an eye on it.