My iphone XS Max occasionally does not download my messages timely. The first it happened was in December and it has happened about once per month since. Most of the time I get my messages promptly. Last night was typical of what happens: On Friday evening a friend left a message. When I got prompt notification of that message, 3 other messages all appeared from this week, the oldest one was from the prior Monday. It's hard to troubleshoot since it is so sporadic. Anyone else experiencing this?