I use a few different profiles on my device to keep things somewhat sandboxed. I generally only switch into my primary profile for app installs, and things that require elevated permissions.
When I'm in my daily driver secondary profile, and I send a message to a group, I think it is being bumped to MMS (excuse my ignorance here) and the message always shows as "Not sent. Trying again." I can retry many times and it never appears to send.
BUT when I switch into my primary account, that same message shows from the timestamp as having sent on the first try. So, it's a relief that messages are sending, but for some reason my secondary account never seem to "read the receipt."
Note that this continues to be true:
Debugging note: If I switch into a third (seldom used) profile, it shows the message as sent, similar to the view in the primary account. Not sure why.
I was convinced this was a carrier issue. But I just got a new SIM card, and it's the same. This is feeling like a Graphene issue. This started last week, right around the time that the 15 update rolled out, which is maybe suspicious, though I have no idea if there's a connection there.
MMS is core functionality for me. I need a fix for this. Any help greatly appreciated.