AppleTV Atmos levels seem off

       Hello all, i recently switched to AppleTV 4k. So far so good, but…. Last night i was streaming The Suicide Squad. My Denon showed DolbyAtmos, the pic was UHD as promissed too.
      My subs are usually good at -2.5db, my MV is usually -15 to -10 its a good sounding system, but i had to raise my MV to 0db and my sub level to +5db, it sounded like usual once those changes were made.
       My denon is the x4300