Steps to replicate the issue (include links if applicable):

• Nominate a page for deletion using Page Curation.

What happens?: A user talk page edit is left without an edit summary.

What should have happened instead?: A user talk page edit is left with an edit summary.

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

See https://en.wikipedia.org/wiki/Special:RecentChanges?hidebots=1&hidecategorization=1&hideWikibase=1&namespace=3&tagfilter=pagetriage&limit=500&days=30&urlversion=2 (JavaScript interface) or https://en.wikipedia.org/w/index.php?title=Special:RecentChanges&days=30&from=&namespace=3&tagfilter=pagetriage&limit=500 (non-JavaScript interface) for recent instances of this bug.

This is caused by https://gerrit.wikimedia.org/r/c/mediawiki/extensions/PageTriage/+/1221112, which also fixes T362477.