I'm running a Spigot 1.11.2 server and randomly I will often have mobs, dropped items and most entities in general become invisible. This is particularly irritating because creepers can sneak up on me and I can't see them. I've searched online to find people with similar problems but I haven't found anything. I am using the Optifine mod and I don't think that has anything to do with it but I'm not sure. Does anyone know what's causing this and how to fix it?
Unfortunately this is a known bug/issue that affects Minecraft versions 1.8+, and has been reported to Mojang: https://bugs.mojang.com/browse/MC-65040