My bad! The quick quote plugin wasn’t on the all-the-plugins list so I missed it when looking for regressions. I’ll add it and I’ve opened a PR with a fix to the plugin:
https://github.com/merefield/discourse-quick-quote/pull/1
(plus a small fix to settings: FIX: Setting descriptions were swapped by cvx · Pull Request #2 · merefield/discourse-quick-quote · GitHub)