Coloring text in Hint does not work

1. What is the issue? Please be detailed.
Tried everything but could color my text in red in Hint.

2. What steps can we take to reproduce this issue?

3. What have you tried to fix the issue?
checked the forum, run the xlsform through the validator but still does not work. When i run the preview the text in hint will come same as posted in the form - Note to enumerator: DO NOT READ ANSWERS, CIRCLE ALL THAT MENTIONED. ASK “CAN YOU NAME ANY OTHERS?

4. Upload any forms or screenshots you can share publicly below.
I am attaching the screenshot of that question in Hint

Thanks in advance

Are you using Enketo (web form) or Collect? It should (only) work in Collect.