2D colliders do not stay on top of each other. They slide!

Hi, I’m trying to make 2D buildings with sprits of wood and colliders. Each plank of wood as to be independent because I will collide with them to destroy the buildings. Like the game Angry Bird. The problem is that when I make more complex levels, some of the vertical planks start moving, making my building to fail… They slide until their are free.

I’m working on this game since 2 years and it’s almost ready to launch but I have this bug. I can’t change for 3D…

Thanks

try changing velocity threshold here.
also try changing Linear Sleep Tolerance and Time to Sleep.