I am trying to make a map that makes everything in Minecraft opposite and I'm trying to make a player go through blocks and walk on air. So I'm using the execute command to make the player go through quartz blocks but the previous output just says failed to execute kill as cow when I was testing. So I tested it on water and the cow died. It might just be a glitch on my computer but I'm reporting it if it is a bug. Please do anything you can to fix this. Thx