Just to give all of you an update.
I just had my Landis Gyr E360 replaced.
Now I have a different brand. ISKRA - AM550
The ISKRA got turned on, and within 60 seconds I could see information flowing into Homeassistant. Issue solved. !! 
So, I will put this on a faulty meter.
ps.
the guy replacing it, noted that I am the second person this week he had to replace one for the same reason, incorrect/corrupted P1 readouts.