Same situation here in one of my hunting spots.
I was blaming it on dramatic increase in drilling activity in the area and late wheat planting. The third possibility is the same old doe still recognizes my truck.
I was going to blame them oil guys too, but I'm the only one on my lease that is not employed in the oil industry so I've kept quiet.
The deer know my truck too. I overheard a doe telling her fawns to stay away when "Ole Dead Eye's" truck is there.