Have a dual band network, usually my iPhone is logged on to 5G and the Wyze cameras are logged on to 2.4G and everything worked fine. The doorbell and chime only work when the phone is on 2.4G - discovered that when I went to the app homepage and saw the doorbell offline, tested the chime and it wouldn’t ring. Weird though is the fact that I could get a live view from the camera and a notification if someone came up to the door.
Just thought I’d share this.