My phone is doing a thing lately where I won't have any voice mail indicators for days, then I'll suddenly have a whole lot at once. The first time this happened, I suddenly had TEN voice mails, some of which were weeks old. It happened again today; this time I only had four, but again they were days old and I'd had no indication of them previously. What's up with that?
iPhone 7, iOS 12.1.4.