Only in this area shown though, if I go away from it, the effects show. So I think it's something in this area causing it.

Only thing i can think of is maby you are exceeding the particle limit (because those effects are actually particles). Are there a lot of particles in that area? you can check how many particles currently exist within render distance by pressing F3 and the particle count is shown as "P:" if that is at 4000 then you are exceeding the limit.

In ang case i am going to be making some changes to those in the future which should fix any issues like this.