Memory leak in newest version?

Hey guys is there some kind of memory leak in the new DH update? I'm allocating 32GB out of 64GB of RAM to Minecraft, it hits max, complains it's out of memory, and crashes. Also itting a TON of opengl debug messages in my logfiles but I'm unsure if that's related. Settings are basic (custom is for some reason the preset, but I did not change anything).