Noifications "clogged"

Are you using Bangle 1 or Bangle 2 ?

Sorry, forgot to mention! This is on the Bangle 1.

On a B1 Full Screen notifcations work BUT the default notfications ends up with a corrupt part of the screen.

Yes, mine looks a lot like that. But in fact, in your case it looks even more broken than in mine. So I guess it's not just a thing with some configuration issue I might have had. Thank you for trying to reproduce!

When I make a test call - I only get a missed call notification - was expecting I would get a buzz while the phone was ringing.

Exactly what I'm getting too. However I'm not really sure this has ever worked as we both expected.