My F245 does not see GPS for the last two runs (((

Hello to the experts!
My F245 does not see GPS for the last two runs. I am running without a GPS connection. As a result, my F245 determines the pace and distance without GPS, but incorrectly. I ran 14,700 meters, but without GPS, the clock showed 12,410 meters (( I offer a photo, there is a flashing sneaker icon. What does it mean?