The sound my MPC makes when it is turned off.

I have an OG MPC Live that I picked up in early 2020. Since the day I got it, about 30 mins after I turn it off, it makes a noise that sounds like metal warping. I’m assuming that something heats up, warps a bit and once it cools it flips back to normal. Other than that my MPC has been amazing! (So long as I keep it on 2.15.) anyone else experience this?