Audiolab 6000a Play Streaming issue

[Satnav]

I have just purchased an Audiolab 6000a Play and taken the offer a trial on Tidal HiFi. I have a Sky Broadband router and have the amplifier connected by an ethernet cable and I use the Play-fi app. Every now and again, the music stops or seems to jam with a continuous noise. To clear it, I have to power off and on again.
Does anybody know if this is a problem with the Audiolab, the Play-fi app, using FLAC or the wifi connection?
Any help appreciated.
Thanks