PCM2704 Dac goes to "sleep mode"

Hello,

I have this usb dac connected to my pi zero (PCM2704): https://www.aliexpress.com/item/3303...chweb201603_55

With this usb hub: https://www.aliexpress.com/item/3289...chweb201603_55

Everything is working okay but after I have not used the player for a while and start a song, the music will start playing through my speakers only when I turn the volume up to 70%. After that I can lower the volume and hear the music normally.

It feels like the usb dac is going to "sleep mode" and doesn't react to the audio signal below 70% volume.

Is this normal behaviour this and can it be prevented?

Thank you guys!