I am having the same problem. I have an iphone SE with the lates OS. I have been on a group text with three other people for a long time. Three of us are using iphones, one is using a samsung, two of us are using Verizon and two are t-mobile. Yesterday, I only received four messages from the group then this morning I received 21 messages dated all throughout yesterday. This has happened before. I'm using the native messaging app and I was on wifi all day yesterday. I received phone calls just fine. I also get duplicate messages when the person only sent the message once.Please help. Thank you.
Hi, Have you received an answer to this question yet? I'm having the same issue. Randomly not receiving messaging in some text groups and randomly receiving duplicate messages.