Yeah my DX90 is set to shut off after 15 minutes of no use. Why would this feature not be present on the DX160? Honestly, I feel overall that android is more of a headache than a simpler OS that is just meant to play music and only do that. I'm having some regrets with buying this DAP. I just want something that plays music and acts like a DAP and not a phone.
Not trying to be "that guy" but if you're buying a full Android OS DAP then it is more or less a phone given it acts like a phone without the connectivity to be one.