Hi, Tomislav Petrovic1
Welcome to Microsoft Community.
We understand that you are experiencing issues related to the desktop sharing icons, but without images we may not be able to get specific information about the icons. I noticed that your problem disappeared after a reboot, which is definitely the best news! If you experience any other issues in the future, you are welcome to visit the Microsoft Community again.Have a nice day!
Best Regards
Nicholas.Z - MSFT | Microsoft Community Support Specialist