DAC conneted to airlens doesn't enter standby mode

Hi,

Just connected my new airlens (that sounds terrific, controlled by Roon) to my DAC (metronome c8). Unlike when connected the previous streamer the DAC doesn’t enter standby mode after the music ends but rather continues to present the resolution and frequency of the last track.
As I’m used to keep the DAC constantly On - is it a problem? Does the airlens ever go to sleep?

Yaron