On my NVMe drive, i have windows 11 and atlasos and on both OS, when i try to play BF2042, the matchmaking works and as i am joining the game, i get sent back to main menu and no error msg appears. But this only happens if i use eth, wifi works perfectly fine. This problem also happened when tried hosting minecraft server, my friends couldn't join unless my pc is connected to wifi.
I tried so many things like trying different eth port on the router and different eth cable but nothing seemed to work.
I thought maybe it's because 2 different OS are using the same IP, so i assigned AtlasOS a different IP and it work!
It's probably a routing issue, it doesn't know to which OS to send the data to.