I found skeleton spawner at 473/48/646 and I want to make XP farm from it. I have empty dark room with water lift (water - air - water - air..) to "move" skeletons up. When I was in the middle of the lift, skeletons spawnes. But when I am on the top, at 477/65/641, no skeleton swim up (some minutes). Maybe no skeleton spawn. When I go down to the water, again they spawnes.
Is there any important distance between spawn point and a place, where I am? Or what is bad? Thanks for help.
Player position in save file is on the top of "water lift" (between torches).