It’s a hard one to catch. It happens sometimes. And i still cannot say when it happens.
But i notice that interface now always do a clean shutdown.
It’s removed from the taskbar, no icon. But when you trfy to start it It’s failing.
Then it’s a matter of checking the running processes list where it in first case not did appear. after trying to start it 5 times or so i finaly did see interface.exe in the list so i can shoot it down.
Notice that it keeps running hidden with a modest cpu load to.