Thanks for reporting all these issues. Overall please refrain from writing such issue summaries, to avoid duplication, kindly rather (as you also did) add your voice to existing topics.
We addressed this in the beta group and have been informed that this in no AOSP feature. So they are looking into it, however its no bug actually, so might not be no. 1 priority.
This issue related to north america only is discussed here and it seems after the released fix, the issue is not fixed completely but no longer as wide spread as before.
Thats for me a rather low priotiry one, as it affects 2 third party apps. I dont think I noticed this using Heliboard.
That might be very specific with this third party app, thus rather not high priority.
Thats discussed here
Thats discussed here
Using headphones, speakerphone, Bluetooth and which app?
please see here for a tip to use an app to bring it back to quick settings