Indesign pixelated text (even with high display quality and anti aliasing)

Hello, I am having a problem with a PDF aimed for viewing on a screen.
Iève been using the same template to make multiple versions of a layout and it suddently started having problems.

This is what it should be looking like: smooth and effective

But unfortunately the text now renders these jagged/pixelated edges, even tough I have the highest display setting selected, and anti aliasing turned ON

It might look minor here but it needs to be fixed.
I've been searching for a solution for a while but i cant find anything that works. Please help! Thanks