NAD M10 Standby Issue

Hey!

So I currently own NAD M10 (1st gen). Some time ago I've noticed a weird problem.

Whenever NAD is woken up from standby mode, the audio for the first 30-40 seconds is laggy, choppy - basically not useable at all. After 30-40 seconds passes (or after 2-3 restarts or single restore to factory settings) everything is back to normal. 

I've tried to troubleshoot but it apparently happens on every source (AirPlay, Optical, Analog). Funny thing is, disabling the standby mode somewhat fixes this issue (since its always on) but in the long run, it's not a solution. NAD currently runs on 3.20.25.

I can't pinpoint a source of this problem, for now I suspect it's a firmware issue. \

Looking forward for any help!

Seb