Sign text color turn into black

Have any screenshot/videos: Yes, I have

Have any labels: Yes, I have

Summary:

This sign long word with color can cause text turn into black after next sentence. 

Step to reproduce:

1. Place any sign
2. Write sign with long word with color (no enter)

Observed results:

Word colored was changed into black when next sentence.

Sign write: Colored

Sign visual: Turn black when next sentence without enter

Expected results:

Word colored should can be colored when next sentence is writed.