Hello,
since the OTA Update from today, there is an addational disturbing lock screen (https://i.imgur.com/Q5GPZEB.jpg).
Does anyone know from witch app this lock screen is coming and how to deactivate it?
Looks like you have airpush adware in some app on your phone. See my other threads about this, looks like you need to take action to get rid of that lockscreen adware.
Phone shouldn't get locked during calling etc, sometimes you can experience "black screen" so please press power button and screen will light up without lock