Track always ends early

I have given the URL for flight aware to family so they can track me while enroute. Lately all the flight tracks quit long before I quit flying or before my services are terminated. I have also noticed that even if I enter a flight plan for 2 hours, flight aware shows that future flight duration as an estimated 30 minutes. It may or may not corilate, but 30 minutes into the flight, shows my flight as ending.

any ideas?

Ryan - N3075L