Delayed Voicemail Notification

- Country: USA - Carrier: AT&T - iPhone: Xs - iOS Version: 12.4 I’m wondering if this is more carrier-related than phone-related, but on occasion I won’t have a Voicemail notification show up until hours after I miss a call. This seems to be random as it doesn’t happen for every missed call and doesn’t seem to be exclusive to calls I send to Voicemail or actually miss. Is there a way to “refresh” my available Voicemail list (as the normal *pull down to refresh* motion doesn’t seem to work) manually? Has anyone else run into this behavior (and more importantly, fixed it)?