Text Message content changed after I sent it

Last night I sent a text message to my partner, however somewhere along the line the content of my text message was changed and he received a completely different text message. Has this happened to anyone else or can someone help me?

Original Text Message I sent:

"Hopefully you'll get a better night sleep tonight, you've been pretty busy today, so you might crash out (emoji) xx

Text Message He Received:

"Hopefully you'll get a better night sleep tonight, you've been pret home to you, or you coming home to me (emoji) xx

We both have screen shots of our messages and can see the message I sent and the message he actually received.

Very strange and a bit concerning. Never heard of this before ever.

Help