Yes, I posted about this earlier on in this thread. I'm in IT and get a ton of email notifications at once, and my phone usually gets emails before my laptop. Also, iOS should group a series of notifications if they are all received at the same relative time. I've had a flood of emails come in and show on my laptop, but my phone sat there for 5 minutes alerting a unique notification for each and every email rather than group them into a single notification. Was convinced this was another cellular issue and It's many quarks. That's said, I haven't seen this happen recently.