Weird. I’m surprised that this is working at all. I thought there would be no points to instance on after creating the first instance. The simulation zone isn’t the culprit here though. The same happens here if i simply chain a few (7) instance on points nodes after another. I have to investigate this further. You can fix it by adding a realize instances node after the simulation. Be careful though. this gets ugly quickly :) And use radians if you pipe a vector into the rotation socket. -pi to pi should give you the 360° you are aiming for.