HomePod mini Airplay issue with Spotify

Hi,

I'm encountering problems with my HomePod mini in stereo mode when attempting to AirPlay Spotify from my iPhone 15 Pro Max. The music frequently cuts out on one or both HomePods. This doesn't seem to be a network issue, as playing music on my other HomePod minis (in the kitchen and bedroom) or using it with my Apple TV (located right next to the HomePods) works without any issues.

I've attempted to resolve the problem by restarting it multiple times, which temporarily fixes the issue but it keeps coming back. I've also confirmed that the firmware is up to date and even tried a factory settings reset. Despite my efforts, the problem persists.

I've searched this community for solutions but haven't found anything helpful. Any ideas on how to fix this?