Dragonfly 5 Pro sonar log file problem

[Jim_MI]

Chuck -
I have updated the DF5Pro firmware to the latest 12.10 (from 12.09).
I did the system reset.
I updated the Navionics maps, sonar maps and community uploads.
I took several trips and just uploaded the logs to Navionics moments ago.
Once again, both logs only included the final leg of my fishing trips! About 1 hr (of 4hr trip) in one case, and about the final 30 min (of 5 hr trip) in the other.
Navionics has confirmed that they are processing everything that they are receiving.
This is getting real frustrating, since I am losing more than 75% of my log files somewhere.
What do you advise next?
Jim