The two group conversations I have on my iPhone that I interact with most are MMS, and often (once a week or so) I will miss part of a conversation and have to piece together what the heck is going on. More often I have a problem where messages send/recieve out of order (even if I'm stationary or using Wi-Fi calling to send), or one message will send and once will bounce so the recipient will get a picture with no context or a caption with no context.

None of us are on the same messaging services (besides Discord I guess, but that doesn't have good notifications), so we can't switch. This is on AT&T, but Verizon and T-Mobile have the same problem.