List of steps to reproduce (step by step, including full links if applicable):
- Have DiscussionTools enabled
- Go to https://commons.wikimedia.org/wiki/User_talk:Spinster
Uncaught TypeError: startMarker is null in https://gerrit.wikimedia.org/g/mediawiki/extensions/DiscussionTools/+/548c0d12c9eef8bd8179e5bb3c1c0740543b4d1b/modules/ThreadItem.js#94
startMarker is set by document.getElementById( item.id );, the offending item.id in this case is "c-EatchaBot-2021-09-22T00:00:00.000Z-MOTD_Notification_3". This happens reliably on every load. I noticed it on another talk page as well but don't remember which one.
What should have happened instead?:
Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.:
Likely related to T300747, but it's happening in Wikimedia production now.