Bad move public mobile. This was the only thing keeping many of the legacy customers subscribed. The points system is much worse than the old rewards program, they're not even close. I'm sure the majority of your subscriber base are on the new points...
This occasionally happens to me. I eventually determined that it was Chrome looking for location. All I have to do is force stop Chrome and relaunch it and the problem goes away.
I use the google messages app on my android, in the settings it has an option to send group messages (MMS) or mass texts (SMS). Check your messaging app for a similar setting. It sounds like you have group texts enabled, but for that one instance you...