Why doesn't my Galaxy s4 receive group text messages when they are sent?

A

AC Question

I am in multiple group messages, some where people have iPhones and some with Androids. However, no matter what, I never receive the text messages that other people sent until 5+ minutes later. For example, it will be 6:00 and someone will start a conversation, but when 6:10 rolls around I am just getting messages from 6:02.