Outer Banks rain sensing wiper question

Hey all, I’ve recently noticed my passenger side wiper (when rain sensing is on) doesn’t go all the way back down into place after each stroke, but will stay about 2 inches higher. Once it determines there’s not enough rain to wipe it will then go down on its own. Also, if I just flip the rain sensing off it goes down. I’ve had my bronco sport for almost a year and just noticed this. I just want to know if this is normal or if I am experiencing a defect? Thanks!