Isn't this the same issue (The problem that the script tab group interface cannot correctly save nested tab groups still exists) you keep creating new posts about?
I think you've been heard, but this seems not to be on the priority list for the moment. Even if I also encountered this issue and would like it solved, it's probably not that easy.
Anyway, I don't think keeping doing new posts will speed up resolution but it will make it harder to track for everyone.