that's regular 1.7.2 not optifines fault, it's very outdated.
tecnicaly is a bug, not a cheat, and you are just using an allowed mod :) so better xd
do you have lazy chunk loading on perhaps? (If so, that is banned)
View the current version of the rules at
This is a unique release, as no rule changes were made. This release should be functionally identical to rules v4, with only minor whitespace and formatting changes.
