It should have been fixed by this commit, I think? Per this topic - Fast edit doesn't work on content with certain characters
https://github.com/discourse/discourse/commit/0a619d8c884e211955ef65b387023f0199aa43cb
If it’s regressed I’ll re-open and move these over. 
Update: I’ve just tested it on your post, and it pulled up the fast edit box and allowed me to enter an edit, but on saving closed the modal and did not make any changes.
(I’ve moved the posts over to the original topic)