Thanks a lot for the overwhelming praise :)
Did you notice this in deathmatch only or other modes too?
Allow me to point out that "building AI waypoints" (a tool in the top-left dropdown menu of the editor) is required to be done so that the bots can move.
This tool essentially analyzes the map so that the bots know how to traverse it, otherwise they stay still.
If you already did this and they still don't move, please upload the map from the "upload and publish" tool in the editor menu, so I can see what's going on. It may be a bug after all.