For the past three days we have not received any voice mail notifications, when I checked a few minutes ago I had several dating back to 2/8, however for these calls the phone never rang, and we were never notified of a voicemail, however we have received other calls since then.
We have OnePlus 6 phones, Wifi calling and VoLTE on, with wifi preferred on, and I have never seen my signal drop below half. One would think at some point over the past few days we would get notified of a voicemail, even after a couple reboots.
Is there anything we can do to ensure we get our messages?