[solved!] Does multiplayer on Helldivers 2 on Arch (CachyOS) work for you?

For me it isn't working. Single player works fine. If Crossplay is ON I can see other games on the world map, but time out when joining the lobby. When I disable Crossplay I see none at all. (Yes, this is the opposite of what you might guess based on other issues people have mentioned where disabling Crossplay fixed it.)

Update: I switched to Proton 9 from the Cachy version and it works!