Google Hangouts not showing old messages for some people

[sammywol]

I've been using the native Messaging app on my Samsung Galaxy S4, but recently I decided I didn't like it. I went over to Hangouts, and it's been fine, however, threads with friends who have another Android device and I'm guessing are using Hangouts I only see part of my message history - maybe the last 50 messages...on everyone else, iPhone and Android users alike I have the whole thing.

Is there anyway I can view all of the messages that were in the native app in Hangouts?