I have a similar issue. Had this on my previous laptop with Windows 11. After starting up the laptop there is a short moment a connection, then it gets disconnected, although it says autoconnect.
Yesterday received my new laptop with W10. No problems, upgrade to 11 today and the problems start to come back.
It's easily solvable by connecting to the wifi, but it's still weird and now seen it on 2 devices (6 yo MSI-laptop and brand new Lenovo).
Update:
Found some possible solutions like disabling energy-saving mode or updating driver. Did both. Seemed to work for a few hours but then the problem returned and at one point my whole internetconnection wouldn't work. A case I also had a few times with the old laptop. Solution: rebooting. But being so fed up with these problems I did a downgrade to W10 and everything is back to normal. One thing: the issues I have I hadn't when I was running W11 developer version on my old laptop. It was introduced with the final W11-release.