Flight Freezes

Twice in succession while attempting to finish a flight from KLGA to EGLL in the DC-6, the flight has frozen after about four hours into each flight. Yesterday, my internet connection dropped during the first attempt. I thought that was the problem but today the flight froze at about the same place with no other indications of problems. I wonder if the saved state of the previous flight may have corrupted todays flight. I'm using MSFS2020. Any ideas?