Greetings ManJor,
I have now updated to 15.3. All apps are updated.
The same issue is still there.
I will try to clarify. This is not occurring in some apps. It is for almost every single app including on the start screen. Going through a number of them I realise that most Apple own apps are affected but not all. Some of the third parties are affected but far from all.
After opening the the iPhone you have the normal screen for about 0.3 s. Then it is like the iPhone is zooming in 3 %. Hence all apps are a little larger and the fixed apps in the bottom are loosing their lower part i.e. there is almost none curvature in the bottom of the icon on the start screen. If I start the Safari-app half of the bar in the bottom is not visible. The procedure repeats for all apps. A quick normal screen and then it zooms in. It is not possible to move the bar upward by trying to move it.
So I am still confused but on a higher number of iOS :-)
I hope this clarifies the issue. I have tried to take a screenshot but not been successful so far...
Thanks for your assistance,
Best regards