[TheChiefJaguar]

12 pro max w/ 14.3: I’m missing a lot of notifications because they aren’t making any sounds. Yes, the volume is up; no, the silent switch isn’t set; yes, notifications are turned on. Texts and emails appear to be the primary sounds that are missing, however the ringtone itself has been missing a few times as well. Is this more likely a phone thing, or a software thing?

[Annie_M]

This is definitely frustrating and seems to be an issue for many who have shared similar experiences here on the iMore forums. There should be a new update out in a few days, but in the meantime, you might want to consider submitting a bug report to Apple's product feedback: https://www.apple.com/feedback/iphone.html#mn_p

[TheChiefJaguar]

So far so good on 14.4