Telemetry Stop During Autopilot Mode using Phantom 4 ProPlus

Hello Everyone,
Im using Phantom 4 pro plus (the one that with android screen monitor on the remote controller), and using pix4d capture version 4.5.0 for collecting aerial photograph in autopilot mode (mapping). During mission flight, there are instances that:

  1. Delay on the telemetry transmission, sometimes no telemetry
  2. Did not take photos but proceeded to as per flight plan (mission plan)