Positively, for anyone who may asking it in the future:
In general I can not understand the ado about Bullseye for RetroPie. There will be a Bullseye release, but it will be ready when it's ready.
There is not need to rush as Buster is officially supported upto Dec 2024.
If someone really needs a Bullseye based RetroPie earlier, he or she should state why, or even better should have run a survey here for the specific functionality which only can be fulfilled with Bullseye and if some other users also desperately missing that functionality.
If you are tech savvy you are welcomed to start a Bullseye port by yourself (with like-minded), if you are not you can hire someone to do so.
TL;DR In any case, please remember that RetroPie is a hobbiest and open source project which is run in the spare time of the maintainers (and contributors). In particular this means the maintainers don't owe you anything.
@hansolo77 I think the retropie team is going to phase out any new binaries and updates for Jesse. The future is stretch. If your image on Jesse is running fine, there’s relly no reason to upgrade. But if you want the latest and greatest, it might be best to redo in stretch.
For anyone who may come across this same problem, to solve it I had to set everything up how I needed it including BIOS roms configurations, and only once I was happy did I run all of the updates and all appears to be working normally again now
@dankcushions I got my main system set up about 6 or 7 months ago and I haven't updated since. I have it pretty much how I want it and don't see a reason to change just yet. I do have another card for testing new stuff though, so I'm ready to go through it all again I might start my setup from scratch and leave out a few things I no longer want.
Which system? When you post about a problem try to be specific. I think its the MAME games who don't work? You did update the emulator which requires a newer romset. You need to rebuild the romset to the required version for the emulator and it will work.