Loud & crackling sound when using AirPlay

Hi,

Most of the time when I use my XR to transfer music to HomePod Mini, the keyboard clicks & lock screen sounds go loud like they are on max volume. I can solve the issue by reconnecting back, but it sometimes take 2-3 tries before they’re back to normal. This also happen when I cast video from Youtube app to my Google TV (the dongle version).

I also have AirPlay-supported Bravia TV (still using Android TV OS), the issue will appear when I cast Youtube videos, but not when I use any AirPlay features. I occasionally use my iPad Pro 11 (3rd gen) to do those things and never have issues at all.

iOS 15.5

HomePod OS 15.5.1

Any help would be appreciated, thanks.