So sorry for the trouble with this one. Our plugins for Confluence/JIRA Server still cannot handle those characters for now.
We recently updated our plugins for Confluence/JIRA Cloud and they now use our latest editor version, where this issue is fixed. Server plugins are next on our list but we still have some work to do before we get there.
Would you like to be notified via email once we release the new version of our plugin for Confluence Server?
That being said, we also want you to be happy with the current version that you are using in the meantime. In case this option has to be available right now for you, please reach out via firstname.lastname@example.org and we’ll figure out something.