This is in addition to the regular random editing problem which can be solved by refreshing.
When making multiple edits it actually removes any previous edits as soon as you click edit.
So if you have edited any intermediate info it vanishes leaving only the original text and letting you add to that.
Its completely useless for adding multiple pieces of info, clarifying etc.
You can copy/paste every time but thats even more stupid than getting the edit to occur in the first place