The mattresses on a split adjustable bed can sometimes slide during the night as partners change positions, causing a gap to form between the mattresses. Slick sheets can add to the problem.To avoid this inconvenience, shoppers can purchase non-slip pads that go between the mattress and the bed frame. Split queen adjustable bed users can also buy mattress suspenders that pull the two mattresses together and prevent a gap from forming in the middle of the bed.