Sticking brakes

My 14 1290R has what i think is a sticking
brake caliper it only sticks for a couple
of seconds then releases.
It more a annoyance than anything.
Dealer flushed system as Ktm says its
a master cylinder problem.
Flushing didnt help,personally I think its a
caliper.
Any thoughts?

Had to get ktm customer service involved
they then call the tech center and they want to
replace the master cyl first.
its ok with me its their dime or 350

If you are referring to the sound when you back the bike up it's typical with the Monoblock front brake. My MV has the same brakes and makes the exact same sound. When I put either bike up on stand and turn the front wheel there is no drag.