dat sound! minecart glitch with slopes and turns

sound and minecart glitch
with a slope and a turn it will do

World link in attachments
steps to reproduce:
1: download world or make something like (pic. 1)
2: put a several minecarts (about 7) down at the end of the rail at the bottom
3: put one minecart at the first bit of slope at the top
4: enjoy the terrible minecart sound and the glitching minecarts...

(text document is only a duplicate no need to read that)