from: 382653060
to: 4294967295
channel: 33
decoded {
  portnum: TEXT_MESSAGE_APP
  bitfield: 1
}
id: 233457681
rx_time: 1770839842
hop_limit: 7
priority: HIGH
hop_start: 7
relay_node: 132

So with MQTT it's using your phone data, so if it disconnects it won't recieve the messages while it's disconnected unless the sender is within RF range. So that COULD be the problem.