I'm game mode, with VRR enabled, while streaming to another device with Steam Link, I experience very poor performance in Steam's UI or any other overlay (ex.: reShade), in the client side.
I tested with multiple Steam Link clients: multiple Android phones, Fedora Laptop, Windows 11 PC and Steam Link hardware, the issue seems to be on the host side.
Audio and input works fine, just the picture is almost static (takes usually more than 10 seconds to be updated).
With VRR disabled everything works fine.
CPU: Ryzen 5700x
GPU: AMD RX 9070 XT
Bazzite version: 43.20260309.1: Stable (F43.20260309)