I have an unlocked HTC 10 that I use on T-Mobile's network here in the U.S. The phone works great, but I notice my 10 has the same issue that the LG V20 and sometimes Sony Xperia phones have...............every like 12-15th MMS (group and/or photo) message I send out to a bunch of ppl will show that it's loading but never go through until I close my texting app (Textra) out, activate it again, and then resend it (no need to reboot fortunately).
My cousin who has the LG V20 also has this issue, and he said other apps like stock and Google Messenger still have the same problem come up too.
Is ANYONE else having this issue? If so, any resolutions?! Don't understand why it's happening cuz the majority of the time it's fine.