It currently resets the suggestions, since the update that added tag propositions based on page content.
(at least on Chrome with any OS)
This wasn't fixed.
@Michael Shriver: do you tried to press arrow up? Suggested tags are now in the end of the list
This is the most obnoxious design flaw that I have encountered on the web in awhile. Fix this.
Indeed, this is VERY annoying... Please fix it!!!
I'm stumbling across this one almost every time, since I use tags quite often. Basically you cannot select a tag using only the keyboard but have to stop typing to select the proper tag from the list with your mouse pointer. Completely breaks the working flow. For the sake of UX this should be fixed.