How to make Windows 10 Bluetooth audio devices work more consistently = not stop partially working at "random" moments?

This has been a quite annoying issue for me for a while, but not necessarily worth fixing as it's not that common. The frustrating part is that it's random and can occur at the worst possible moment, e.g. before an important call. Now it happens with Sennheiser Momentum M3 AEBT. I know it's device independent since it also happened on old laptop and 2x old BT headsets - Momentum M2 and Razer Hammerheads. The only things in common are Windows 10 and a bunch of apps, although it also was happening with nearly clean Windows install on this device. It looks to be not the greatest ever coding of Mi

Question by Destroy666 on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.