I'm using 2.1.74.14250.
I was trying to work on performances today. The toaster was connected and in Performance mode. When trying to reorder performances via Ctrl up/down arrow, and also sometimes when copying / pasting to a different location, I would start getting duplicate performance order numbers. In the attached image, note the duplication of 3 and 6.
Once things got into this state, there was nothing I could do to get it sorted out (no pun intended) other than shutting down RM and restarting it. When it came back up, invariably I would have lost work.
Is this a known issue that's been addressed? If not, I'll be happy to come up with steps to reliably reproduce the problem so the devs can address it in the next maintenance release.