Purchased this last August. Since then, I've noticed that there are a few spots that are getting low. Not a big round bowled type area. It's more the width of about 3" or so and has a clearly defined edge that you can feel with your hand or feet. Seems like a piece of the framing has sunk down. In that spot, the linoleum flooring is no longer tacked to the sunken piece of wood and you can push it with your finger.
Anyone else experience this kind of issue?