LG G4 - last 2 Android releases problem

A

AC Question

Just went through the latest Android release (marshmallow?) and sad to see that a major problem that showed up in the last update is not resolved.

My screen will often get enlarged making me have to reboot apps to get it to be manageable again. It bus happened with my email and so strghled with a lot of finger manipulations to find the send key, not wanting to reboot the app.

What is wrong? Anyone else having this problem? do I need to factory reset or what?