XZ1C OTG External DAC/AMP issue

[Keyakizaka46]

Did anyone have the same issue? 

While connect external DAC/AMP via USB OTG, after pausing the music for sometimes (more than 5 mins), music will come out from front facing speakers but not DAC/AMP connected, the only way to have it working properly is to reconnect everything. It has never happened on any other Sony phones I've used. It happens regardless what app you use, even the built in music app does the same.

[SonyXperia007]

First of all why would you even use a third party music app when you have the walkman player in the phone the player in the phone is a feature it self.