Picture changes colour when dragged to different monitor

If I have a picture displayed on my primary monitor and drag the C1 editing screen to a different monitor, C1 detects the different monitor and changes the colour of the displayed picture, in terms of tint and saturation.  It looks like it might be a profile-based change, but I can't find any setting for monitor profiles that would explain this, or allow me to control it.

This is definitely not just due to a difference between monitors, because it occurs after I drag the screen over.  There's a delay, and I can watch it happen.  And it is not a monitor difference alone, because it does not show up if I have a picture split across both monitors.  The two are identical monitors; I just have calibration set differently in the hardware settings of one of them.

Is there a setting somewhere in C1 that could explain this?   I've searched and can't find anything like that in the interface or documentation.