I had been told by another player that it may be related to Duke. However, my two games that froze do not have Duke. I did getMy game froze up on gifting reset clock just as croocker was coming into town. I found just closing and restarting the game croocker finished docking.
But after he left, his ghost was still lagging behind so screen was floating at times. I just move dock away from road until its time for him to return.
one to start back up but that is my F20xch account that is level 10 and I do nothing on there except send F20 no flights, no visiting neighbors.
The other I do send flights and visit neighbors, so perhaps a combination of Duke or the lack thereof and the planes trying to land. My main game Duke has been relegated to always being off a road and had no issue. I mainly did that after the update since I use a boost pad to collect passengers, with a 185% boost I need far less passenger buildings. Every time I moved a building to collect after that update Duke would do his ghostly reappearance making me wait(so annoying) So off he went away from the road.