As @BudWalker noted above, the uplink was connected for longer than a few seconds at the end of the flight log. However, since the download was disconnected, you couldn’t see the live video and telemetry data in DJI GO. That likely made it seem like the remote controller was not connected.
At 4m 6.2s in your flight log, you can see the aircraft was heading toward the crash site at full speed. You can also see you at the elevator in the full up position – commanding the aircraft at full speed ahead. You must have had that stick forward at other points too since the aircraft somehow traveled between these two points while the downlink was disconnected:
You could contact DJI support and ask them to review the aircraft DAT flight log. Perhaps they will find some kind of malfunction around the 2m 35.1s mark that makes your Mavic eligible for a repair under warranty.