In Gitea version 1.11 we moved to goldmark for markdown rendering, which is CommonMark compliant.
If you have markdown that worked as you expected prior to version 1.11 and after upgrading it’s not working anymore, please look through the CommonMark spec to see whether the problem is due to a bug or non-compliant syntax.
If it is the latter, usually there is a compliant alternative listed in the spec.
