Unstable bluetooth/ music playback

I listen to music on my watch through Spotify while running. The playback performs great when it's just headphones connected however when the watch is also connected to a HRM, the music playback is janky and cuts in and out constantly. I can only assume this is an issue with Bluetooth when both external devices are connected.

Note - I've been running with this setup on my previous Fenix 7 with no issue.

Please fix.