On my new ADI 2 dac I have noticed that for some tracks the SR value displayed for USB occasionally flickers between two values e.g. 44.1/88.2.  Is this a fault or is there an underlying reason for it?  My system is: Roon Rock (NUC 7i3)>Allo Usbridge(Dietpi)>Adi 2 dac streaming from Quobuz.