When I launch a full screen HDR app (mpv, for example) while I have bitdepth 10, hyprland doesn't revert back to SDR when app is exited or full screen is exited, leaving an insanely bright display

Bugs / FRs / Support
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1
Hyprland version 
Hyprland 0.54.1 built from branch v0.54.1 at commit 4b07770b9ef1cceb2e6f56d33538aaffb9186b9c clean ([gha] Nix: update inputs).
Date: Tue Mar 3 21:06:41 2026
Tag: v0.54.1, commits: 6979

Libraries:
Hyprgraphics: built against 0.5.0, system has 0.5.0
Hyprutils: built against 0.11.0, system has 0.11.0
Hyprcursor: built against 0.1.13, system has 0.1.13
Hyprlang: built against 0.6.8, system has 0.6.8
Aquamarine: built against 0.10.0, system has 0.10.0

Version ABI string: 4b07770b9ef1cceb2e6f56d33538aaffb9186b9c_aq_0.10_hu_0.11_hg_0.5_hc_0.1_hlg_0.6
no flags were set

Describe your issue / feature…

If I start mpv with an hdr movie in full screen mode, my monitor switches to HDR. This is good.

However, if I exit fullscreen mode or kill the app, it stays in hdr mode with extreme brightness.

Monitor config:

monitorv2 {
  output = DP-1
  mode = 2560x1440@144
  vrr = 3
  bitdepth = 10
  cm = auto
}

If I comment out the bitdepth, it correctly reverts back to SDR mode when exiting fullscreen hdr app.

Monitor is AOC Q27G3XMN

Arch Linux