the shadows cause strong flickering, on the ground, trees, bushes, walls and more. The visibility on the flickering varies depending on which setting you have on the shadow detail, but it is always there.

Here are 3 links to videos showing the problem

https://www.youtube.com/watch?v=zcHsQUypFa0

https://www.youtube.com/watch?v=V2jUVb-0_jg

https://www.youtube.com/watch?v=Vq4iVTUBpC0

https://www.youtube.com/watch?v=04qiw3y0G1c

https://www.youtube.com/watch?v=Sh8qcRXNnp4

https://www.youtube.com/watch?v=ZswNZ532730

The last video is also a flickering problem. this happens on trees / leaves, and is also visible on trees further away at a certain distance, also clearly visible in video 3 on the bushes, leaves, and the wall. Not very healthy for the eyes.
visible more clearly if it is checked in 1440p, even more visible ingame