Well, if a few weeks ago you installed the update signalled in the first link of my previous post ( Software Update: 8901.4.A.0016.6) then I would strongly suspect that your current problems are consequential to that update, and therefore I would recommend waiting for a correction patch which, I would think, is likely to be offered soon.
Have you contacted official support about this? If not, you should.
A patch has already been offered to a user for a medical application.
To check which version you are running, go to
Settings > About phone > Build number
Lineage OS is Android too, I won’t go into the differences here, but the fact that Lineage users are experiencing similar problems may help in tracking down the exact origin of the problem (if it’s the same problem …)
@gabrieleb This might be of interest.