Very sorry to necro this thread, but I just ran into this today in the middle of playing Elden Ring while I was fighting something. It caused me to die and lose some progress.
The Start11 updater window appeared over the game (since it's borderless windowed). I decided to let the update download in the background, and then the installer window appeared over the game a 2nd time!
Why is Start11 and its updater/installer taking priority over everything else and displaying over fullscreen games? This seriously needs to be changed.
I don't want to disable automatic updates because I'd like to get them, but this invasive app behavior is horrible. I recommend displaying a native Windows 10 / 11 notification and allowing that to launch the updater from there. It ties into the OS and doesn't disturb users, and users can manage their preferences around notifications on their own.
Thanks!