Vegetation redrawing/ flickering in a 360 video

Hi there, I’ve exported a 360 video from Twinmotion and when I play it some of the trees redraw/ flicker. It’s an odd effect but quite distracting as your eye is drawn to to the change. Has anyone had this problem before, perhaps I have setting incorrect? I have noticed that the trees that have just been placed in the scene are behaving correctly, it just seems to be effecting the trees that were painted using the vegetation tool.

many thanks

Amy

I've uploaded a very short 360 video that shows the effect. If anyone has any ideas it would be much appreciated!

may have something to do with the shadow settings as the view moves around the scene