Render misbehaving in queue rendering

scyhoce

Hello, I'm using ManFridays render queue to render an animation scene, each frame is a still image. The queue goes through all the saved scene files to render each frame. The problem is that some of the frames render in a funny way, some objects lose their ability to cast shadows for example in few frams the get back to normal in another, the lighting gets changed in a weird way. What could be casuing this? 

scyhoce

Solved - the problem had nothing to do with the queue rendering, I tried messing arounf with the enviroment settings and turns out the "Ground position mode" was casuing the probelm. I had to put it on Auto.