So after doing some investigating my attention was drawn to this line in the config.
To choose a different output device (ie a USB audio dongle or HDMI audio out),
use--devicewith something like--device hw:0,1. Your mileage may vary.
Investigating the different device options, I believe that hw:0,1 indicates that you want the audio to be output over HDMI… On a whim I tried setting this in my config for raspotify like so and restarted the raspotify service:
OPTIONS=“–username xxxx --password xxxx --device hw:0,1”
Voila! It has been working without issue now for around an hour!! What I don’t understand is why I needed to set this… My understanding is that the default is to output audio over HDMI.