Suddenly (I work on these same images for quite a wile) the histogram-window stays blank. If I go to the next image and come back to the previous, than it might come back/build up.
It eventually builds up but but I wonder why it is not simply there, to stay.
Any Idea ?
Since this issue suddenly appeared can you try to reset your preferences? Quit Lr and hold down CMD Shift and Delete when reopening Lightroom. Choose Reset Preferences.
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