App not getting messages after a while of inactivity

Alright, I recently picked up a couple of the ttgo v1 modules. I flashed them both with 1.2.28. They work as expected for the most part. However where things get weird is when you leave them sit for awhile. The radios are still on and paired, and I can send messages and the other radio receives it, as the OLED screen shows it. But the app never gets the message. If I disable and then reconnect the radio, the message then goes to the app. It happens on both ends. Is there something I need to tweak?

There is a firmware bug somewhere between 1.2.10 and 1.2.28.

I guess I should try looking a bit harder next time before posting then. But it’s good to know that this issue is out there.