脚注のサンプルが機能しなくなりました

The example in the OP does actually not seem to be working properly anymore. Blank install on tests-passed:

explorer_gJSz6ivkT3

「いいね!」 3

Thanks, we will have a look over the next few weeks and get it sorted.

「いいね!」 4

Got a possible fix at FIX: Allow multiple references to same footnote by pmusaraj · Pull Request #38 · discourse/discourse-footnote · GitHub.

「いいね!」 5