Just got back from a week out with the mini 2. Fortunately it didn’t race through battery life like it sometimes has, but sending messages through the messenger app worked less than 50% of the time, so had to send messages manually through the device.
No clear reasons or setting changes that I could tell.
Kind of a pain in the ass, not a happy customer….
I use the Earthmate app for sending messages. I found the Messenger app a pain as it tries to send messages via cell or satellite.