Put the summary of the bug you're having here
Blocks replicating upwards glitching like mad.

I was expecting to have two of them pumping upwards in a fast pace for my parkour map I used an app called I redstone because I ran out of redstone ideas.

After a minute or two blocks were coming up it was like the slime blocks and redstone blocks were bouncing of themselves at one point it stopped.
I had two of them rubbing together up and down at a fast pace 4 or 3 times up per second,with this you can duplicate more blocks you stick on the slime like diamond blocks stone e.t.c anything that sticks too slime.
THIS COULD OF HAPPEND EVER SINCE SLIME BLOCKS WERE ADDED TO THE GAME.

1 place a sticky piston then another one block away
2 place a slime block on both with redstone on the side
3 put a redstone block in the middle to activate then break it
4 just in case put another redstone block besides one of the sticky pistons.