Hello,

I've had this problem where the volume goes to Max when stb first loads. if you press the left arrow, it'll quickly go down, and you do that one time.

There's a fix for this, it'll cost some money, but give better outcome. Buy a soundbar. Or any sound system.

Once your sound is coming out of the sound system not TV speakers, your volume is always adjusted to your previous preference.

Cheers,