Have had DJI Mini 4 pro since last November and in that time have been amazed, and keen to show people, how well it avoids obstacles - and it's ability to find routes through some very tight hedges. Up till last weekend I had not had one strike or used any spares, at worst the drone would get stuck and need input to find way out of a spot.

Last Saturday I flew at a regular field and was surprised when the drone clipped a branch and went to ground on it's first flight, in an area where it had performed faultlessly in the past. No damage luckily. I checked blades and cleaned all four sensors although the pictures all looked fine.

Next flight and again it clipped a branch. This time damaging a prop. Took it home and had a good look for loose blades or dirty lenses but could see nothing wrong.
Sunday back to field and again it clipped a branch - this time damaging two props.

Up to clipping a branch it appears to avoid obstacles in it's usual brilliant way.

Has anybody got any suggestion what else I should check?

Hi there,

We are sorry to hear about what happened with the aircraft. In a situation like this, the best course of action would be to submit an online repair request through the link here. This will allow our certified technicians to inspect the aircraft fully.

Please rest assured that this will be taken care of and handled accordingly.