Mic feedback terrible after adding Eufy Floodlight 2k

Added Floodlight 2k to existing 5 cameras (all 2C ) and video wired doorbell (2k) now all notifications accompanied by loud screeching like an open mic feedback. All systems up to date, volume on phone lowered to point can’t hear it ring, volume on all cameras set low, rebooted systems no joy. What to try next perhaps scrap system and go with another brand . If so what will actually work.