lg g2 group message question

[stantheman62]

I have a g2. I received a text from someone who was in a group along with me. I read it quickly but then it was gone. Why didn't the message save to my phone as when i receive a text from someone not in a group. Your help is appreciated. Thanks

 

[UJ95x]

Welcome to AC
Does this happen with any group messaging or is it the first time it has happened?