[Halted] Terrain not receiving shadows (shader issue)

[true lichen]

Hi, i am having the problem with my shadows not showing up anymore (in both scene-view and game-view), even after checking several places (urp settings, project settings, etc.). The strange thing is: when i open Window -> Analysis -> Rendering Debugger, and under "Lighting Debug Modes", when i change "Lighting Debug Mode" or "Lighting Features" to anything else than "Nothing", then suddenly the shadows show up (please see attached screenshot). But without Rendering Debugger, i can't get the shadows to be shown.

And here how it looks without the Rendering Debugger being open and have values changed, both scenview and gameview:

(no shadows)

Here are my settings

URP Settings:

Project Settings -> Graphics:

Project Settings -> Quality:

[true lichen]

Directional Light (got only this one active in the scene):

I also tested disabling most other gameobjects except player and terrain, to make sure nothing interferes, but even then the shadows are not shown.

[true lichen]

For all objects that are meant to cast shadows (like the barrels in the initial screenshot), i have "cast shadows" set to "on":

[true lichen]

...
** UPDATE **

I am a step further in debugging, i found out the shadows are in fact working, but the terrain does not receive shadows, found out by moving a simple plain into the are where shadow should be, there we see the issue:

Terrain not receiving shadows

Terrain has "cast shadow" set to "on":

[Halted] Terrain not receiving shadows (shader issue)