Jabra pulse headset is not working with my iPhone X

I am able to connect my Jabra Pulse headset to my iPhone X, and i clearly says "connected" in the bluetooth menu... but no matter what i try, I am not able to get any sound from the headset.

On my previous phone (iPhone 7), a small headset icon appeared on the screen when connected - this strangely doesn't happen on the X?

I have updated the headset software - but this still does not solve the problem?