Animation - Masks shifted and Fonts are flickering

Hello, this is my first post in this forum

First things first:
Setup: Windows, Asus ROG STRIX G15 (32GB, RX6800M, Ryzen 9 5900HX)

In the attachements is a GIF of the problem.

I built a few lower thirds a while ago and they worked perfectly fine.
Out of nowhere the masks were shifted and the fonts began to flicker.
I tried to change the masks (even replaced them) but no matter what I did the problem sustained.

So I exported the project file and opened it on my Macbook Air and they displayed without any problems. The same happens with text animations from a working colleague. So I guess it has to do with my laptop. So I did a default reset of my system, but it didn't help. I have still the same problem.
I'm at a point of not knowing any further. So maybe someone here had a similar problem and can help me.

Thanks for any help in advance