Bar numbers are shown at rehearsal marks, although it is disabled in layout settings:
This project started as an xml import…
It’s not a bug, but a problem with the XML. Try deleting the first time signature and re-entering it. XML sometimes has problems with meter.
Hi Dan, thanks for your reply. After doing some tests I found out that it has nothing to do with XML.
Dorico seems to hide bar numbers at rehearsal marks only if they are placed on the same side (top/bottom) of the staff.
Especially when using rehearsal marks that show bar numbers I would like to have an option to hide them even if they are on different sides of the staff.
I think that would look a little odd, personally, but to each his own. I’m glad it’s not a problem with XML.
Hi Dan, the question came up when I was asked to copy a given layout, where bar regular bar numbers were hidden hat rehearsal marks.
So it is not necessarily my personal taste 
Maybe the layout options dialog could grey out the corresponding option automatically if bar numbers are shown on the opposite side of the staff.
I think it can be confusing when you think you can choose between options that do not have any effect in the end.