Tracks not showing in timeline / sequence

Whenever I drag my video and audio track from my source to the sequence, the tracks immediately go invisible. It shows in the program window, but doesn't show in the sequence unless I scroll down. If i scroll back up to 0:00 or even later, it bugs out and becomes invisible again. It is some weird scrolling issue but also something else, I don't know what.

It is not because I am zoomed out or in too much either horizontally or vertically. It is also not because I have v1 or a1 off. I already reset the workspace, uninstalled and reinstalled, enabled and disabled certain settings. 

I don't know what is happening, I've used premiere pro for years and never encountered this before. Can someone please help?