Scores get each other's titles on first edit after reordering tabs, crash on close
1. Open any two scores at once—say score1 and score2.
2. Drag one of their tabs to change the order.
3. Make any edit to either score.
Result 1: the title displayed in one of the tabs changes to be the same as the other.
Repeating steps 2 and 3 in different combinations, you can get both tabs to say score1, both tabs to say score2, score1's to say score2 and score2's to say score1, and even get them back to their original state.
4. With the tabs not in their original order, close one of the scores.
Result 2: crash.
My hunch is that it's not worth the effort to figure out what's going on, and it's simpler to just revert #8954: Move Tabs Around.