Formatting code § doesn't work on sign

The Bug

When enter a formatting code to make the text have types or colors, it just available in the edit interface. And when escape the interface, the text which is used formatting code on it will change back to the original form.

 

Reproduce

• Enter a formatting code on sign or hanging sign (in file, it's §l and §a)
• Complete edit and close the edit interface

 

Observed Result

Text suddenly lose all forms after closing the edit interface.

 

Expected Result

Text reserve forms.