If distant shadows are set to low, objects like trees (trunks) are rendered in very low quality. On medium, with all other settings the same as before, they are ok.

Second issue that the game doesn't remember the graphic settings and switches the distant shadow to low every time I return from the game to the menu.

There is a big inconsistency in the graphics settings in general, sometimes the image looks different even if I do not set anything, only after starting the game. Changes into graphics options, such as distant shadow, then cause other strange things. Even a seemingly unrelated change will make the image look quite different in terms of lighting, quality of rendered objects and so on.