Taken from https://phabricator.wikimedia.org/T111830#1644629:
One scenario doesn't seem to work:
Re-opt-in ( features/opt-in.feature:37 )
1. You have a wikitext talk page
2. You opt-in, opt-out, and opt-in again
3. The flow board description should contain a template with a link to your archived wikitext talk page
It looks like modifying the board description the second time to add the template doesn't work on beta. It works locally.