Loop markers don't update when number of instruments change

1) Add 4 pianos (so the sheet has 2 pages)
2) Select a section on the second page (any section will do, but the farthest from the beginning the worst it gets)
3) Activate loop playback (loop markers should appear)
4) Hide all but one instrument

Sheet length will change but markers stay in place

Loop markers should update position every time note layout change, that can be, changing note length, adding a palette, hiding/showing instruments, adding/removing notes, etc. Any time note layout change, the markers should change with it