Oversaturated Glyphs when changing GUI scale modifier to -1 in fullscreen

The icons/glyphs will become oversaturated if you change the GUI scale to -1 and have the game in fullscreen mode.

Steps to Reproduce
1. Change your GUI scale to -1.

2. Make sure the game is in fullscreen
3. Go to How to Play and check the hunger icons. Or you can go to the servers tab in the world selection menu.

Expected Result
The icons don't get saturated after changing the GUI scale.

Observed Result
The icons get saturated.