Hi,
I have the same problem with screen sharing.
Could you describe how to perform the downgrade of pipewire?
I found a better solution/ workaround:
Accoring to this bug report in the Pipewire repo if you uncomment the “metadata” module in the default section of the file /etc/pipewire/media-session.d/media-session.conf and restart the pipewire service with systemctl --user restart pipewire.service it works again 