Why do glyphs that have the same highlight colors have slightly different shades of hue at times? I have double-checked and both E and F in the screenshot have the orange color (and not brown) but the color is slightly different. This happens inconsistently and I can’t replicate it 100%.
One of the two glyphs has changes and that adds a gray background.
The grey background Georg means is the indicator that the glyph is not saved. Save the file and you will find the grey background has disappeared.