/testforblock does NOT send a pulse when the tested block is out of the rendered world

So I have a command block on a repeater clock with the following command:

/testforblock "x" "y" "z" end_stone

this command's output is connected to a NOT gate with three command blocks. one plays a anvil sound, one removes a point from the team, and one sets a end stone block at the position.

The problem I am having is when the end stone AND the command block is out of the rendered world, the command block doesn't send a pulse, removing a point from the team.