Ok. Ambient Pressure (which appears to be "okolitý tlak" in Slovakian) comes more or less directly from the pressure sensor in the watch. Elevation and Barometric Pressure are calculated values, based on the ambient pressure.
So if Ambient Pressure is missing, there is a high possibility that you have a defective pressure sensor, and not just some software calculation gone wrong.
As far as I know from earlier Fenix models, the temperature sensor and the pressure sensor is the same hardware component in the watch, and when one fails, the other often fails too. I think this is the first time I have read about a Plus model having a defective pressure sensor. (I actually waited for this model before buying because the F5 seemed to have these problems.)
I've experienced a few weird issues installing Spotify, but after about three days, all my sensors and Spotify seem to be working. It actually took me three days to actually get the sync to not issue a Sync Failure message(another user mentioned the same). In that time, I saw Spotify say it was syncing 1 small playlist and running the watch dead, the watch completely locking up. At one point while trying to uninstall the app, I could not get it removed via Garmin Connect(Uninstall Fail, in RED, was the message I think), and had to use Garmin Express.
I checked all my sensors, and all seems settled and working at the moment. I'm afraid to touch it now.