When setting a piston on a delay to push a block, flying away from the area causes the piston to not extend when the redstone signal hits it. Using two repeaters to store the signal, i can see that the signal made it to the end of the delay but did not extend the piston. I can also fly back towards it after storing the signal at the end of the delay and can see it extending as it comes back into view meaning it did not extend when it should've.