Letter "ç" turns the glowing text outline on the sign gray

Summary:
The letter "ç" makes the line of glowing text (outline) gray.

Steps to reproduce:

1. Place the sign.
2. Write/paste the letter "ç" (you can also add other letters).
3. Take the Glow Ink Sac and make the text glow.

Observed results:
The line containing the letter "ç" has a gray outline.

Expected results:
The line containing the letter "ç" will have a white outline.