Messages from CERTAIN iphones getting split up and received out of order.

[AC Question]

I have a galaxy s6 and my girlfriend has an iPhone 6. Whenever she sends me a text regardless of how many characters (unless it's like 2 or 3 words), the message gets split up and sent out of order. This problem only happens with certain iphones as well. For example my 3 best friends have iphones and all their messages are sent perfect no matter the lenght but some other friends of mine their iPhone messages get split and scrambled.

Just as example of what I'm talking about:

The original message might say:

"hey I'm going to the movies this afternoon with mike and wanted to know if you want to join. Let me know, we're going at 8pm".

I'll receive (multiple messages) something like this:

"mike and wanted to know if you want"
"were going at 8pm"
"to the movies this afternoon with"
"to join. Let me know"
"hey I'm going"

Like I said it only happended with certain people and their iphones not all iphones. Any help would be awesome

Just some extra info:
• I have tried multiple messaging apps but this problem happens no matter what.

• the iphones all use the default messaging app (both thends ones that have the problem and the ones that dont)

•My messages come up perfectly to all the phones (both the ones with and without the problem) no matter how long or short they are.