pin + stayfocused windows don't get focused in certain games

[hachimagi]

I have these rules:

...
windowrule = tag +temp, class:pavucontrol-qt
...
windowrule = pin, tag:temp
windowrule = stayfocused, tag:temp
...

When I launch pavucontrol-qt while certain games are the active window, the pavucontrol window appears, but the game stays focused, moving the mouse controls the in-game camera etc.
This happens regardless of whether the game is floating, fullscreen, or tiling.
I can still manually focus the pavucontrol window with movefocus hotkeys.
Happens regardless of PROTON_ENABLE_WAYLAND value when launching game.

Pavucontrol gets focused on launch properly in all other situations, as far as I can tell, including other games.

Possibly related to the games "disabling" mouse cursor to use it for camera controls, at least that's the pattern from the few games I tested.

Tested games where pavucontrol...

• doesn't get focus: Helldivers 2, Deep Rock Galactic, Elden Ring
• gets focus: Ender Mangolia, 20 Minutes Till Dawn, Nine Sols