On the Super Mario Mash Up Pack world made by 4jstudios back when the console edition of the Wii U came out there are these pipes which you can go though and there is a redstone mechanism which uses a pressure plate to activate a sticky piston which pushes a slime block which when stood on WOULD launch you up in the air to get out of the pipes. This mechanism no longer works though and if you do attempt it all that happens is you stand on the block whilst it goes up. My guess is that at some point in the past redstone got changed in a update and it ruined the mechanism. Not sure when but I've only discovered this bug now. I sadly can't share a screenshot of the error but if someone tries it out you'll see the problem straight away. Thanks for reading and I hope the problem is resolved soon.