haven´t try´d it on a new world creation but on an existing world i have a crash with the newest release. Not sure if this is related to optifine"OptiFine_1.12.2_HD_U_F6_pre1_MOD"?
thanks for looking in to it

"https://hastebin.com/yafodumuqe.rb"

sorry, obsolete i overlooked your last explanation with considers the incompatibility with newer optifine versions.