Unfortunately, with UniFi, you’re very limited to what you can configure. Hence why moving the MoIp system to a separate VLAN will help. Tag the ports you’re using for MoIP to that VLAN and that will help with the “chatter”.
I’ve done large Dante Audio setups on UniFi (customer owned) and the only way to clear up the “issues” was a VLAN.
No experience with MoIP on UniFi, but most of these systems have the same switch requirements.