Server crash with genetic machine

[BluGen]

Hi, as the the title says, I've encountered reproducible server crashes. It happens when I look at a genetic machine from the downside and only if Optifine is activated. Without Optifine everything works fine. I use binnie-mods-2.0-pre14 and Optifine C1 for 1.7.10. I've attached my crashlog, maybe it can be helpful.