When creating a maniphest description if the text of a field such as Differential Revision: something here exists inside of a triple backtick field arc fails with the error:

Usage Exception: Invalid "Differential Revision" field in commit message. This field should have a revision identifier like "D123" or a Phabricator URI like "https://phabricator.example.com/D123", but has "don't forget this".

this is particularly annoying when writing diffs about the parser or referencing other commit messages inside of an existing one.