Tnt Cannon Upward momentum is bugged

This bug has been going on for a year. Highest tnt cannon now only goes upward 78 blocks and that is only one design. Most only 10-30. This is a petition I started that has a video in it showing the problem. https://t.co/NeSCnbrfQf which you can find the video here https://www.youtube.com/watch?v=8ALOjMEXUPw

I cannot release my water park with this bug as two games require high momentum from cannons at minimum 100+ blocks in height. I built the largest theme park in minecraft Notchland over 500,000 downloads which has been toured by stampylonhead, popularmmos, bajancanadian, logdotzip and more. This water park Notch Rapids that I am trying to release is eagerly anticipated but I cannot release it with these bugs. For the Wii U version with the mario mash up pack you fixed tnt upward momentum for that console and I would appreciate you doing the same with the other consoles, thank you.