Indesign glitch

Hello,

For a couple of weeks, I've been having a few issues with InDesign. Whenever working with text it will get an unusual glitch: parts of the text (or anything with vectors) will look "chopped off" - you can see the white parts of the text below. The same happens in the background. I have no background applied right now, but every now and then I'll get half of the page in grey.

Anyone has any idea of it could be? I tried resetting preferences but without success.

Thanks!

Nuno