WSL2 NAT network broken - perhaps after docker

I recently upgraded win10 to win11. Afterwards I noticed that WSL2 gave me an error:

wsl: Failed to configure network (networkingMode Nat), falling back to networkingMode VirtioProxy

Now the chase started... I attempted network-reset, reinstalling Hyper-V and WSL2, removing docker etc. etc. I found the "update & repair" feature of windows - which actually seemed to fix things - briefly. By then Docker was no longer installed and I installed it. Afterwards WSL2 started failing again. I did another repair - and then it went back to working... but again only very briefly.

There are a lot of potential factors at play here. I spend quite many hours chasing a solution - but so far without any luck. I would rather fix things than reinstalling windows and just hoping the problem will not return.

Should mention that ESET is also installed on the machine. Ofc I have tried disabling and also uninstalling it. _Not_ through safe-mode, I should mention. Before the initial repair I could not open things like the Windows Firewall - which just failed with an error. After repair it correctly tells me that ESET is controlling it. 

Right now it's hard to figure what is cause and what is effect. Inputs and suggestions will be appreciated :-) 

TIA!