Just a little background I have an Samsung Galaxy S8 with most updated software and the carrier I'm using is Sprint. I have had this phone since it's initial release and this just started happening recently. To my recollection I didn't install anything, change anything, or do anything to have it start happening. I have one friend that I know if and every time we are in a group chat or MMS chat it sends all of these characters which seem like some sort of formatting text. It sends this before as a separate message and then whatever he sends as a text. Below is a screenshot of what happens. It does not happen when I text him individually and not in an MMS format. The issue happens in Textra which is my normal texting app as well as the default messaging app. I have attempted to delete the conversation as well as reinstall Textra and it still does it. Please help!