https://bugzilla.redhat.com/show_bug.cgi?id=2137159
--- Comment #11 from Mads Kiilerich mads@kiilerich.com --- (In reply to Nils Philippsen from comment #8)
Another case in point of having separate packages for different major versions is the changes in how tempo maps are implemented in 7.x vs. 6.x -- see https://tracker.ardour.org/view.php?id=9030#c26705
I don't know why paul commented like that. Reality is that it is a simple fix for a rare problem. You can apparently apply https://github.com/Ardour/ardour/commit/b195a04281cdd9352c010d3e5ea24ea03074... to fix it.