I have an issue with Tidal streaming, the left channel goes on and off before it works well

When I first start up my system it works fine, after maybe five minutes the left channel disappears and then returns after maybe ten minutes. After that it works fine. I don’t think it’s my preamp nor amp which work fine for any other input and I have changed preamp inputs with no change in behavior. I have used a deoxidant on all the cable contacts with no effect. Tidal comes in via a Mac Mini which I just bought refurbished from Apple and the output from that goes through a Mytek Brooklyn DAC which I just bought used on ebay. Anyone have any thoughts here? I have played with all the options I can find on Tidal and nothing changes. Right now I am listening to Tidal on my PC rig via a Dragonfly and I never have problems with this.