many times when I try to edit the message the editor shows the HTML code of the message instead of the Markdown code. This basically prevent from the simple user to edit the message since he cannot see the message in a readable way.
For example it happened to me here: https://docs.microsoft.com/en-us/answers/answers/39905/edit.html
It seems like the data which is stored in the database is the encoded content (to HTML code), and the decode of the data to Markdown code fails.
Tip! for advanced users: you can copy the HTML code to online converter like this one. This will allow you to copy the markdown code back to the QnA editor in order to read it and edit it.