I have to retract this statement now. I am getting noise in quiet passages and between tracks (when they start). I tried multiple USB C cables and the problem persists. I have a support email in. I tried with and without WiFi on in the phone, same issue. Does not happen when used with laptop or through the headphone jack of the same phone.
I’ll report back but I have to retract my resounding endorsement of the Sparrow for the moment…