An issue was discovered in the Cargo extension for MediaWiki through 1.39.3. There is mishandling of backticks to smartSplit.
https://phabricator.wikimedia.org/rECRG920f3c19a84175bcfe93f41ecf9f8cef32730f8e
https://phabricator.wikimedia.org/T331362
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/900133
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/898722
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/895774