SOLVED! Clicked the track --> Audio --> Dissolve Part
I was about to edit a guitar track, when I noticed it looks a bit strange. It seems like there is two tracks stacked up on each other. When I click the track named Gitar (D)_14 it appears as Guitar (D)_12 in the editor. When I try to delete it it all dissappears. I have no idea hoow this happened, and how to fix this.
Anyone seen this before?