I had something similar happen when I left the mentoring track of a language. I had to start from scratch to get the 100 mentoring sessions in another language before I made supermentor.
My details are slightly different, but I believe that once you leave a track you lose your session count.
If you rejoin the tracks you should get it back. That might not auto-trigger though, so maybe @ErikSchierboom can double check for you.
No the session count is kept, but we do check whether you’re mentoring the track or not. So once you’re mentoring again, it should work.
I think it doesn’t. I’ll look into it.
That didn’t work in my case. I rejoined the track as a mentor (and waited a week) but didn’t get any credit for my past sessions.
(Edited - oh, if this is a manual process then that’s probably the solution. I had an open ticket for over a year on this but it was never addressed.)