Change in Image During Clone

[andyschlei]

I am seeing a very strange phenomenon.  I open a FITs file, then clone it.  And the clone is noticeably brighter than the original.  See the attached screenshot.

A clone should not make any change to the appearance, I would think.  Both images do not have an STF set.

They have identical histograms, but appear different on the screen.

[andyschlei]

I cannot recreate the error.

I think it was related to color management setup.  But since I can't recreate the issue, case closed.