Recently I’ve been getting stuck from time to time with what you see above. One or the other middle tabs of the edit event window will slide partway past where it’s supposed to stop. I tried maximizing the width of the browser window, to no effect. Generally when this happens it’s just one of the tabs, i.e., if I go forward or back to another one they display as they should.
I have the same issue.
It’s a timing issue with the cursor focus. If the cursor is moved to the starting field before the tab has fully displayed, the tab only partially displays as you’ve seen. I just increased the delay before the cursor is set. Please let me know if you still see this. You’ll need to open a new browser tab to get the latest update.