The Auto Mode assignment for the application is likely incorrect or the preset isn't properly configured across all monitors.
Open Dell Display Manager and navigate to the Auto Mode tab. Verify the correct Preset Mode (like 'Color' or 'sRGB') is assigned to Photoshop.exe. To add an application, you can drag its icon from your desktop or Start Menu directly into the DDM task list.
Check the assignment for each connected monitor. A Preset Mode assigned to an application can be the same on every monitor, or it can differ from monitor to monitor. Ensure the setting is correct for the specific monitor you are using.
If that didn't work: Ensure the application is an executable file. DDM does not support assigning presets to group files, scripts, loaders, or non-executable files like ZIP archives.