Default Anyone else having a problem with Group messaging on CM11

I am currently running CM11 on my SG3 with AT&T, and while group messaging works it seems to hang up when I get too many messages at one time. It shows that someone has replied but then it does not display the message rather it show it is downloading but nothing ever comes through. I have attached a screenshot of the reply I get when it hangs up. Does anyone know if this is a phone/software issue or is it service issue with AT&T? Thanks in advanced for your reply.
Attached Images
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