Dream on me bassinet/bed side sleeper

Hey! I have purchased the skylar dream on me bedside bassinet/sleeper but the directions are very unclear when it comes to the maximum height of the adult mattress from the ground. In many places it says no mattress higher than 24” from the ground should be used with the bassinet as a bedside sleeper but then in other reviews and frequently asked questions it said it would be fine because there are 5 adjustable heights that accommodate taller beds. My mattress is currently 27” from the ground and with the bassinet at the tallest setting it sits higher than our mattress. Does anyone know which one is correct/accurate?

Thank you!♥️