Night mode is not working on SteamRT3

[cyruzin]

Your system information

• Device: XBOX Rog Ally
• Steam client version: 1780620638
• SteamOS version: 3c (3c.0.20260526.238681)
• Opted into Steam client beta?: Yes
• Opted into SteamOS beta?: Yes
• Have you checked for updates in Settings > System?: Yes

Please describe your issue in as much detail as possible:

When enabling Night Mode Scheduling or Night Mode (Until Morning), the display remains unchanged, even when adjusting the intensity using the sliders.

Before it stopped working completely, I noticed that when it tried to activate through the schedule (the way I had been using it on version 3.8.6), the entire screen turned red. I then disabled it, and after enabling it again, it no longer worked.

I also noticed that the "Enable Night Mode (until morning)" option stutters a bit when activated; the transition is not smooth.

Expected behavior: Night Mode should function correctly, along with its other options, and tint the screen with an amber color.

Steps for reproducing this issue:

1. Enable the "Use experimental SteamRT3 Steam Client" option under System → Beta Participation.
2. Try using Night Mode.