Hi, I believe this is a bug but wanted to see if it was isolated or other people have noticed the same behaviour.
-Model has a Model Break View
-Balloon is added in Drawing
-Jog Point is added in Drawing to the Balloon Leader
-At this point the leader "dot" or anchor moves to where the dot/anchor would have been if the Model Break View wasn't present.
See video: YouTube
I have submitted this to my VAR for comment.