I see this issue for an year already. Why nobody gives any normal reasons and I only see "Allocate more memory" or "Use 64 bit Windows".
The problem is in forge, but I'm not programmer so if anyone here is? Something messed up with forge, as it doesn't connects with any other mod.
I even activated forge apocalyptic method with deleting bugged entitites, but now something happens to sky. No optifine, no journey maps, nothing, only forge (That's why I'm writing here as it's forge issue)