I implemented GestureListener in my Overlap2dStage to pan the camera when the player drags its finger over the screen. But I also have some actors that extend InputAdapter to detect when the user touches on them. Then I mix them with a InputMultiplexer.
So far it's working fine on my computer, but when I get into Android and tap an object it trigers both:
pan() from stage and
touchDown() from the actor.
I remember I read something about a pan box to decrease the sensibility, since in a touch screen you are touching several pixels, it detectes a pan. It's worst in smaller screens.