I’ve never seen this before. I have show bar numbers at rehearsal marks unchecked. However, bar numbers are still appearing at rehearsal marks. Any ideas why bar numbers are still appearing at bars with a rehearsal marking?
It only hides the bar number if the Rehearsal Marks are Left Aligned with the systemic barline (Otherwise, I guess, Dorico decides there is room for both)…
Alternatively. If you choose to align the RM to the right of the clef and set the Layout option to position Bar Numbers after the system clef too, you will get the same result (the bar number is hidden)…