I guess this is kind of broken, or doesn't work as intended. There's a js completion for tags, if the substring matches something that you already used. Which is cool. Kind of.
But when you skip to one of the suggestions using the cursor keys and hit return, it's just going to save your article and leave you with the partial tag.
This is certainly not intended, right? I mean, the whole point of suggestions is probably saving time. Using both hands for typing (like probably most people writing stuff on a regular basis), it's kind of annoying to have to use the mouse to click on one of the suggestions instead of just sticking with the keyboard at all times.
I consider this feedback and not a bug-report, because I don't know if this behavior is actually intended or not. If there's another way to accept the keyword shown in the suggestions without using the mouse, please tell me.