Preview error of imported video

Hello there! I am currently working on a video project. More specifically, it is an instrucional video where I animate photoshop layers. The animation with the layers is fine. But when it comes to the part of the prior recorded screen video importeded into AfterEffects and preview it I can see display errors. I already changed the preview settings from "adaptive resolution" to "off (final quality)". But the preview errors are still there. By preview errors I mean for instance the mouse movements doubling or pixelated views every now and again. Viewing the video outside AfterEffects, the described display errors aren't there. Does anyone have a tipp for me how I could solve the problem? Thanks in advance!