I was labeling this frame detail and remembered how frustrating it was when i couldn’t get disconnected Balloons to reconnect with an arrowhead.
The trick is the selection priority. By default, edges are selected during the placement of the Balloons. However when the Balloons are disconnected due to placement needs, the Selection priority takes over for the reconnection. If the method is set to Part Priority, then the arrowhead cannot reconnect to an edge, but the dot takes over to connect to the surface of the part.
So if this happens, simply change the selection priority to edges again.
Now, the edges become the priority, and the arrowhead edge configuration will reappear, and attach as desired.