Manual adjustment of tuplets above the staff lost on next layout
Reported in https://musescore.org/en/node/291435.
1) default score
2) enter a quarter note triplet on mid-staff "A"
3) adjust the tuplet bracket toward the staff, but not touching it
4) edit something else on that system
Result: the tuplet jumps up
You can see after step 3) that min distance is wrong in the Inspector, it should get smaller, not larger, as you approach the staff.
Workaround is to manually set min distance to 0 (or negative) for any above-staff tuplets you want to manually adjust.