Debugging "CAM Msgs and Files discrepancy"


I tried to do a survey mission with the Pixhawk on a skywalker X8 and Sony A6000 connected with a Seagull #MAP2.

on one mission i got exact math between log CAM msgs and pictures on an other i had “CAM Msgs and Files discrepancy. Check it! files: 511 vs CAM msg: 1228”

how do you debug if the problem is at the Seagull #MAP2 or Sony A6000 or Pixhawk, how can i tell why the huge difference?