hit a key on a physical keyboard (to operate the puzzle)
the background becomes grey, reducing the contrast
How to avoid the effect
enable night mode
select a puzzle with the physical keyboard
However, the background becomes grey again as soon as the touch screen is touched again (in any app) and the physical keyboard is used in sgtpuzzles.
The grey background looks like the background of the selected puzzle in the list of puzzles.
In short, any touch event followed by any keyboard event seems to cause the puzzle control become selected and change its background colour from black to grey.
To see the effect:
How to avoid the effect
However, the background becomes grey again as soon as the touch screen is touched again (in any app) and the physical keyboard is used in sgtpuzzles.
The grey background looks like the background of the selected puzzle in the list of puzzles.
In short, any touch event followed by any keyboard event seems to cause the puzzle control become selected and change its background colour from black to grey.