MacBook speakers crackling when connected to AirPlay speakers

Hey there, so I’ve been having this ongoing issue with my MacBook Pro for a while now. I have a HomePod mini and a Sonos one speaker. When I connect my Mac to these speakers either individually or together through AirPlay on Apple Music, the MacBook speakers start crackling. The crackling noise only comes out the MacBook speakers but not the other external speakers. As soon as I disconnect AirPlay the sound is perfectly fine from the MacBook speakers when I connect again it’s back. Sometimes the crackling is loud and sometimes low but it’s there. I have checked with Apple support and the Apple Store and they ran some tests but all looked fine. Even tried reinstalling the software and a factory reset as well but the issue is still there. It is a unique issue since even the apple support people were confused by it. Hoping to find a solution to this cz it doesn’t look like anyone else has this…