The dealer tells me they have mine fixed though it's still there for other issues so I've not tried it out. They say the nut on the drive spindle at the base of the arm gets loose and let's the arm rotate too far. Try aligning both arms when the wipers are in the down and stored position by loosening the nut, pulling the arm off and rotating it, then replace the nut. Hope it helps. Good luck.
2015 Legacy SR340 360RB
2014 Jeep Wrangler Unlimited Toad
Gigi, Poppy and Sadie Lady...On the road, but not full time!