[Experimental] Random spruce leaves spawned in the air

In my Experimental world, whenever I go to a newly-loaded visited chunk there are a few random clusters of tree leaves spawned in the air for no reason. Also, there are a few times when some natural rock blocks (stone, andesite, granite, etc.) that I used for my buildings automatically convert to other types of rocks. There are also a few floating water blocks that generate randomly in the air sometimes when I reload my world.