Ok so today I restored my windows 10 from backup and I found something rather strange. On my windows 10 I'm running driver version 220.127.116.1160 which runs with absolutely no issues.
After updating driver to the latest available from Intel website guess what happened... Audio Display started dissapearing just like on windows 7. So it's defo a driver issue.
Now where and how to find a driver for windows 7 that will work as good as this old one on windows 10?
Back to windows 7, uninstalled the latest drivers and installed 18.104.22.16852
Problem no longer occurs. I shall test it for a few days and see if it really is fixed but so far all seems very promising.
It's just very dissapointing that the newest drivers appear to be worse than the old ones, where it should be the other way round.