Hi, thank you for the reply!
I have a Moto Z Force with Android 7.1.1 installed. I'm not sure if anyone else is having the issue. It does not matter which application I use, the group text does not even show up. I can only see it with the Messages+ app.
This has been happening since at least the beginning of August, that's when I first realized I wasn't getting the messages. I've been trying to figure it out and different apps, settings, etc. to no avail.