Wall's Obstacle is too big.

I swear I had previously seen another very similar post where someone had identified the changelog which introduced this behavior. I have spent way too long looking and can't find the post I was looking for now.

I did manage to find this:

Which might be the bug which was fixed which caused this change in behavior. 

" Can' t place wall if there is one item nearby. "

You actually can, just make sure that you dropped that item on the wall grid perfectly, but you gonna need this mod :

https://steamcommunity.com/sharedfiles/filedetails/?id=1601725838&searchtext=action

And enable drop on grid from settings, place 3 piece of wall as u did in this screenshot:

Place your character in the middle and shift + right click to drop that item perfecly on the grid. That will allow u to place the 4th piece of the wall.

Edited November 30, 2019 by co-operator