Landing bounce automatic mode

Im having trouble with a PX4 Build. Quadcopter is a 4kg 15 inch prop generic model. I have set Hover throttle to a nice level where the quadcopter stays at a level altitude in stabilised at mid throttle. Ive played with PWM_MIN but I cannot get it to land in any Automatic mode. It comes close to the ground thyen rises or bounces before settling and the throttling up again with throttle stick down.

Here is a link to the flight log. Can anybody see a problem. Many thanks