Interesting! It's stable on my machine. I wonder if this is due to floating-point differences.
On my machine, the initial state isn't simulated. It only begins simulation when I touch it. At which point, the weight causes the bottom blocks to intersect each other significantly.
I‘m guessing it‘s somewhat framerate-dependent.
On my machine, the initial state isn't simulated. It only begins simulation when I touch it. At which point, the weight causes the bottom blocks to intersect each other significantly.