Hello @DDbang, since Linux host + Proton to Steam Link Android client works, that makes your issue an issue with the client side of Remote Play with Steam for Windows instead of an issue with Proton. Report this issue to Steam Support for the main Steam team to take a look.
Closing as out of scope for the Proton project.
proton experimentalx1 2022-11
Compatibility Report
System Information
I confirm:
The log is still too big after compress...
Symptoms
The game is able to start on the Host PC (Ubuntu 22.04 System). But when I start remote play on my laptop (Win10 System), the video display will be stuck before the game start, but there are game sounds and the cursor, also a slow network warning icon on the page. It is ok for SteamLink on a mobile phone. So it seems the problem is about the streaming on PC.
Reproduction