So I recently realized that in Settings > Advanced Settings if I select "Enable Keyboard Input", then it works reliably!
Vojtech would you take a look at this - or please explain why keyboard input would have any effect on the colour of the background window...at all?
And I totally wanna thank you for adding this feature, man...because the way Melda plug-ins are built...well gosh darn that contrasting colour is super helpful!

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