This might have started happening when I got the Steam Deck preorder alert: whenever I open Steam, it minimizes every window to show me an account alert reminding me to confirm my preorder, and then I got those three minimized windows I can't do anything about.
I've just permanently dismissed the account alert and it seems to be OK, for now.
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
When the application is started, it shows as minimized in the dock. Clicking the Steam icon in the dock renders three Steam icons representing three minimized windows (with no preview whatsoever) that can't be opened nor switched to. Closing one of the icons from the overview screen kills Steam.
This is what shows when I click the Steam icon in the dock:
Opening Steam from the tray area still works.
Steps for reproducing this issue: