HomePod stereo pair - one dropping out frequently
I have two HomePods which are set up as a stereo pair. One will stop playing at times, and will either come back after a minute or two, or might need reset to play again. It doesn’t seem to make any difference where the source sound is coming from, e.g. Apple Music, Apple TV or another device like an iPad, the issue happens fairly regularly when the HomePods are in use. It is not always the same HomePod which stops playing.
I have tried resetting, unpairing and setting up again, restoring to factory settings and setting up from the start and the problem persists. I have a BT Internet Hub (BT Halo 1) providing my internet and wifi.
Any ideas for troubleshooting would be great to hear. Thanks!