As was just brought up in the discussion about the vote, the current markdown-parsing in the comments is causing quite a few bugs and the associated convenience might not be worth the costs of the bugs. We now have an experimental option in your user-profile to switch to a pure markdown editor, so it might make sense to just remove the automatic markdown parsing from the comment editor and have it just be a pure rich-text editor.
I left two comments that you can vote on to decide between the options.
What kind of issues are being caused? Normally Markdown parsing is fairly standard and well understood, if a parser causes issues, couldn't you swap it out for another? (I use https://github.com/markedjs/marked in my own website and I've had no issues, but of course that's not a guarantee)
See https://github.com/Discordius/Lesswrong2/issues/314 for my summary of the issues.