I'm pretty sure this isn't a particle issue as I've manually bonemealed the area and no crashes occurred. ..so here's what I've found I have a small flower farm 8 pistons firing by way of 4 repeaters in a clock formation on both sides pushing 10 grass blocks I added 1 observer to power 2 dispensers to shoot out bonemeal on each side but when the grass/flowers break the game crashes again it doesn't happen when manually bonemealing only threw dispensers