Yeah reman calipers almost always ship with air in them, the boxes sit on shelves for months and that fluid settles out. Tbh the bench bleed is non negotiable for me now, takes like 10 minutes with a hose looped back into the reservoir. Did a set on my buddy's truck last summer and one of them was dry as a bone out of the box, no way that would have bled out right on the truck. Phoenix heat just makes it worse too, fluid gets thin and that air loves to hide in the lines.