RSTP Port Priority Not Working?

Has anyone noticed the port priority setting in RSTP to have no effect in RouterOS v2.9.50?

I had a link drop last night and when it came back up I could not force the router to change back to the correct root port by tweaking the port priority.

All the path costs have been carefully checked and rechecked because I saw this same behavior in the lab before I implemented the loops in our network. I decided that path costs were working correctly and that I could manage the issue that way.

Thoughts?

It’s working fine and tested in 3.3. Just don’t know about that…