Hi,

I believe I've found a bug (or at least an unintended interaction) with DisplayFusion 12.1.1.

System Information

DisplayFusion Pro 12.1.1 (Steam)
Windows 11 25H2 (Build 26200.8875)
NVIDIA RTX 4090
Samsung Odyssey G93SD (5120x1440 @ 240 Hz, HDR)
Two additional Acer XB271HU monitors

Problem

Whenever I enable HDR (either through Windows Display Settings or DisplayFusion Monitor Configuration), HDR turns on successfully, but approximately one second later it automatically turns back off.

Troubleshooting Performed

HDR remains enabled if DisplayFusion is completely exited.
Starting DisplayFusion does not disable HDR.
Wallpaper Engine was completely exited with no change.
DisplayFusion correctly detects the HDR state.
The issue occurs whether HDR is enabled from Windows or from DisplayFusion.

After troubleshooting, I found the cause appears to be this Trigger:

Monitor Profile Changed
→ Run Function: Load Monitor Profile: 3-Monitor Normal Layout

As soon as HDR is enabled, Windows appears to generate a "Monitor Profile Changed" event, which immediately causes DisplayFusion to reload my monitor profile. That reload restores the previous HDR state, causing HDR to turn back off.

If I disable only this trigger, HDR works normally and remains enabled.

My Desktop Unlocked → Load Monitor Profile trigger can remain enabled without any issues.

Expected Behavior

Enabling or disabling HDR should not immediately trigger a monitor profile reload that restores the previous HDR state.

I'd be happy to provide logs or perform additional testing if needed.