Dark theme vs. which image is selected
Let's discuss which image is selected:

Obviously it is the one with the black background, much different than the
grey panel background.
But wait! There's an [X] box next to the other image.
Ah ha, so actually it's the other image that is selected. Rather visually confusing.
Debian Gimp 2.10.22-1
Edited by 積丹尼 Dan Jacobson