Alexa started adding “playing on Sonos” to all her responses

I have been using a Sonos one and Sonos Beam since each were released. In just this last week, when requesting music using Alexa on both of these devices, Alexa has started adding “now playing on Sonos” to the end of her confirmation. So now she’ll say something like this “getting your KCRW radio station from Tune-In, playing on Sonos.”
Prior to this week, she never added the “playing on Sonos”.
For the life of me I can’t think of any change I made to my Sonos set up in the last week, so no idea what caused this change. This is pretty annoying, because I don’t even have any non-Sonos Alexa devices, so of course it’s playing on Sonos with every request I make, lol!
Does anyone know of any way to disable her adding “playing on Sonos” to her confirmations?

Thanks! 🙂