Describe the bug
Sometimes when using the rich text editor where image are present, back slashes are added to the markdown

To Reproduce

Expected behavior
Slashes should not be added to Markdown

Screenshots

Applicable Versions:

• Netlify CMS version: 2.15.27
• Git provider: GitHub
• OS: MacOS 11.5.1
• Browser version Safari 14.1.2

Issue occurs on all browsers.

CMS configuration
https://github.com/SSWConsulting/SSW.Rules/blob/main/src/cms/config.js