Can't have the --window option work with xdotool click

I'm trying to make an autoclicker (for a farm) in a video-game (Minecraft if you want to know) that works even if the window is in the back. I disabled the game auto-pause upon losing window focus successfuly and then tried to use

xdotool click --repeat 100000000000 --delay 1000 1 --window  $(xdotool search --name --onlyvisible Minecraft)

or simply

xdotool click --repeat 100000000000 --delay 1000 1 --window  WINDOW_ID

where WINDOW_ID is the ID of the game window that I manually fetched. But both commands completely ignore the --window option and act as

xdotool click --repeat 100000000000 --delay 1000 1

i.e. it clicks where the mouse is currently pointing. Am I doing something wrong or is there some technical limitation that I'm not aware of?