Small amounts of land not loading

Small amounts of land do not load, and are invisible see-through blocks. You can step on them, interact with them, but they sometimes will not show up. Sometimes it last seconds, sometimes minutes. Me and a friend we're building, and I couldn't see what I was breaking, placing, anything. It worked (redstone would work like it was supposed to), I just couldn't see it. It may be a result of the new setting added.