Sonos queues emptying regularly

I’d I like my Sonos queues across all of the devices to have something in them so that when I hit play in any area from a button or whatever way of controlling that there’s always something to play rather than an empty playlist.

So, I’ve made a Node-RED flow that attempts to do this with some repeat steps, because sometimes it doesn’t always work, maybe I was sending in the commands too quickly. But anyway, I still find myself with empty queues all the time across the house.

Has anyone else had this issue and dealt with it in a different way?