Bug: Behavior while deleting Clicks in Magic Mask 2

Right now I am in Studio 20 (not beta anymore). I copy a very simple grading and a magic mask from one clip to another. In the new clip I delete the clicks I made before and what happens with every deleting of the clicks the marker jumps in the beginning of the timeline. So when I had 4 Clicks in the timeline this happens with three of the them, just the last one stays as expected.