Since today at least, whenever I set the Steam Link client on the Apple TV to set performance overlay to detail, Steam Link crashes as soon as it connects to the PC.
I see the green checkmark on the connection screen, but as soon as it's about to switch to the PC view, Apple TV goes straight to Home.
On the PC side, you can see Steam go into Big screen mode, and remote play popup comes up, but few seconds after the Steam Link client crashes it pops up that it's disconnected, and goes back to Steam desktop.

Running latest Steam Link app (1.1.93), tried both the Steam "stable" and steam Beta clients on desktop (running latest patched Windows 11), and latest official tvOS (not on 16 yet).

As soon as I switch the client back to Icons for performance overlay, steam link starts and connects without issues on the Apple TV.

This worked at least 2 weeks ago when I last tested the performance overlay in detailed mode.