Walls and pathfinding

I came across a weird problem while making a game. Enemy npcs are like this - if you arent doing anything, pathfind to a random position(random x,y). If failed to find path, again - pathfing to a random position Once path found, move along it and etc... Everything should work okey, but when the npcs get near the walls, they just stop moving and stand there. I Believe that npcs have found a path, but its in the wall or something like that. and because of that, they arent doing anything. Shouldnt it be "failed to find path" at that moment ? hmmm

You may need to regenerate the obstacle map

Also if you're using Unbounded Scrolling the pathfinder gets weird results because it doesn't considers the area outside the actual layout size to exist

Thanks for the suggestions. After trying out lots of stuff, I found what was causing the problem. Looks like the npcs didnt like the thing with - if failed to find path, find to random x,y. By disabling it, looks like everything started to work again :)