Sonos is transitioning

I'm using the Sonos Integration to play a white noise track stored locally on my NAS to an Ikea Symfonisk Speaker. About 25-35% of the time there is a long (up to 30 second) delay before the audio plays. If I look at the logs in Hubitat I'll see it shows "Kid’s Room Sonos is transitioning" prior to playing.

I know there could be plenty of unknown factors at play causing the delay in this case, but my question is, what specifically does "transitioning" mean in this circumstance?

Thanks for any insight!

that it's attempting to connect and start downloading the audio track.