https://bugs.winehq.org/show_bug.cgi?id=49543
--- Comment #20 from Hans Leidekker hans@meelstraat.net --- (In reply to Wiley A from comment #19)
For Astroneer this issue is still present in Proton 9.0-3 > Wine Mono to 9.2.0. You're unable to connect to dedicated servers running encryption for crossplay with Windows, Xbox and Playstation consoles.
Testing was done using a Steam Deck.
The version of GnuTLS on Steam Deck is too old.