Airplay scratching problem

[sapzxc]

Hi!

I have problem with Airplay. Attached audio sample: there are playing from amatilinea then from macbook and then again from amatilinea.
Looks like network speed problem, but I have 1Gbps LAN with stable link + Ubiquity Pro at 5Ghz. 
Network diagnostic window shows normal speed for about 1-2Mbps when playing. 

Playback from USB flash drive works great.

Model:
HW: i.MX6
SW: 20191001

Tried update, play with settings, different devices, LAN ports, cables.

Any advice how to fix?

UPD: Sorry, re-added sample

[sapzxc]

Spotify works normal, but not AirPlay

[Daniel]

I just tried Airplay by playing music from youtube on iphone, just works. Did you turn the Airplay ON?

[sapzxc]

> Did you turn the Airplay ON?
Yes, if I turn it off I can't connect to device via Airplay.