Describe the bug When "_" is used to underline text, despite deleting the characters, the message still displays as underlined.

To Reproduce Steps to reproduce the behavior:

1. Open chat with someone
2. Style a message with the beginning _
3. Delete the _
4. Message still displays as underlined.

Expected behavior A clear and concise description of what you expected to happen.

Details (please complete the following information):

• Siskin Version: Testflight 7.0 (3)
• iOS version 14.7.1
• iPhone model iPhone 11

Additional context Add any other context about the problem here.