I was involved in an extensive group text conversation today - 6 other people including myself, and over 50 messages. I received some of the messages fine, some were delayed a few hours but eventually received, and some still have not been downloaded, over 8 hours later. For the ones that I haven't received, I can see that they're there, with a "Download" button, but if I click that I get a "Couldn't download message" notice 10-30 seconds later.
It doesn't seem to depend on who sent the message - for each of the other 6 people involved in the conversation, I've successfully received at least one message from each of them, and there's at least one message from each of them I haven't been able to download.
It doesn't seem to depend on when the message was sent - the ones I've received are interspersed, chronologically, with the ones I haven't been able to download.
It doesn't seem to depend on whether I'm connected to WiFi - for most of the day while this was going on I was not connected to WiFi; later I connected to WiFi, which made no difference. Mobile data is on. I'm able to browse the web (with or without WiFi) and make phone calls.
It doesn't seem to matter which messaging app I use - I tried 5(!) different apps, with the same effect on each. Next SMS (formerly known as Handcent, which is my default app); the stock Droid messaging app; Textra; Chomp; and Verizon Messages+. (The only difference being that Textra and Chomp do not provide a "download" button for the unreceived messages.) For each, I tried setting the app to be the default messaging app, rebooting the phone, and allowing it time to download the missing messages on its own; no luck with any of them. All apps were the latest versions. I've now uninstalled all but the stock messaging app, with no change.
I'm on a Droid Razr Maxx HD running Android 4.4.2.
Help??? Not only is it bad to be missing these messages, it's frustrating to try to follow a conversation when you can't see half of the messages!!