I’m fairly sure the issue of slow bug fixes was raised at a recent community meeting with Jolla - specifically why they don’t ever issue any patches in between releases to fix serious bugs. I believe the answer was that they don’t intend to change their current strategy (i.e. no patches, only fixing bugs in new releases) but that they would try to bring out new point releases more frequently.
This being the case I think we just have to accept that bugs, even serious ones, may be outstanding for some months before they are fixed - and in some cases not even then. As we all know there are numerous bugs that were reported years ago back on the old TJC forum that still remain unfixed to this day (@peterleinchen being the knowledgeable expert on these I think).
Often the community here can advise on ‘keep you going’ workarounds and some of the more expert devs here have been very successful at this, but I agree it is disappointing that proper fixes for really serious issues aren’t forthcoming more quickly.
I still have to restart my XA2 on 4.1 at least two or three times a day to keep my email synchronising and to get mobile connectivity back for Android apps, and that’s been going on since I put Sailfish on it in 2019