I get a bit of a buggy behavior now and then.

I turn my Keymaps off.
Then switch to Toon A, Toon B, Toon D and Toon E in turn.
I'm driving with Toon C by default.
When I switch to each toon, I position them at a cardinal point around the edge of a tower.
Basically doing the Ebon Knight dailies to kill gryphon riders and ghoul their corpses.

However, when I switch to Toon E, half the time it turns Mouse broadcasting on.
So double button press to move her to the edge, has the other toons run off.
Not really sure why it does that.
But pretty much just turn keymaps on then off... again.
And turn repeating on and then off...
And then I don't get this issue.
And it only does it on the tower, does not turn repeating on elsewhere, when I position them individually.

Weird behavior, but anyway.. turning the keymaps/repeater on and off, fixes it for me.
Probably should for you too.