Example: https://de.wikipedia.org/w/index.php?title=7/27&action=edit&lintid=1956834
I have seen this in a few other instances as well. Parsoid's linter has to more smartly detect linter issues. The example below demonstrates this very clearly.
[subbu@earth parsoid] echo "a<ref><center>c</center></ref> <references/>" | parse.js --lint > /dev/null [info/lint/obsolete-tag][enwiki/Main Page] {"type":"obsolete-tag","params":{"name":"center"},"dsr":[31,44,2,2]}
Parsoid has to be smarter and look into references content and attribute linter issues to the <ref>tag causing it.