I have three Ones in a 2 room setup: living room with L+R; kitchen with a single One. I have no problems playing music through the Sonos app, but music/audio is inconsistent from Safari, Chrome, and iTunes (sometimes it works, sometimes not).
I have tried both wired and wireless setups, and have set the wireless band to 11 for the Sonos network (it is 1 for the router's 2.4GHz band).
I have no problems playing audio from Safari on my wife's Macbook Air running Mac OS 10.14, from the Netflix app on an iPad Mini 2 running iOS 12.3.1, or from the Sonos app on 2 Android phones.
Best answer by Airgetlam
Your comment about Safari, Chrome, and iTunes implies that you're using AirPlay 2, rather than using the Sonos system itself, correct?
I'm looking at an Apple page which seems to say that AirPlay 2 requires MacOS 10.14.5 or later.
I'm guessing this might be your issue?