Another option for a "workaround" is to add a jog to the leader. If this is done while there is no constraint active, the constraints will not pop up while moving the balloon or the jog. If there is a constraint active, the arrow end of the leader will be stuck with that constraint until the jog is removed.
It was acknowledged over a year ago, but it seems the issue has not been addressed.
FYI It seems they do listen, sometimes. This issue should be resolved in 4.0 M130 coming out this month in response to this idea: Option-to-disable-turn-off-annotation-leader-snapping
Only took 2 1/2 years😎
Found this to be useful. Solved my problem.
If you follow the link in my previous post, at the bottom is instructions on the fix implemented in 4.0 M130.
The simplest is to turn it off by deselecting Snap To Guides.