Double shadows from one directional light

In a simple scene, I have one directional light and somehow it’s casting two shadows, like if there is one additional light:

I’ve even tried to turn off “Cast shadow” on the light, and, while one shadow disappears, the wrong still remains.

The wrong shadow disappears only when I completely remove the directional light from the scene.

In the project I’m using only the dynamic lighting, and the static lighting is completely disabled in the project settings.

It may be caused by low lightmap resolution of the landscape if you are using static lighting.

Oh, I forgot to add, that I’ve completely disabled static lighting in the project settings and all my lights are dynamic.

Removing the light from the scene and creating it from scratch resolved the problem.