Hostile mobs flashing in and out of existance on peaceful?

As the title says, mobs will spawn for the briefest instant at nighttime, and then despawn because the server is set to peaceful. This is the first time I have ever set up a server, so I appreciate any help. The only plugin I'm using is the Essentials plugin. Thanks!

 

so what is the problem? when u spawn hostile mobs they will come in for a split second but since the server is on peaceful they deny hostile mobs so they cant spawn. to change the difficulty you have to go in the server.properties and change difficulty from 0 to 1. 0=peaceful 1=easy 2=normal 3=hard

 

The problem is, mobs spawn at night. They flash in and out of existence all over the place constantly and it is extremely distracting.

 

that is how it is u cant change that im pretty sure

 

I'm having the same issue. My personal difficulty is set to peaceful, my teammates is set to peaceful (it's only us 2) and i went into the server's file and set it to peaceful there as well. But at night, the mobs pop up at different locations on the map, then dissappear in less than a half of a second. It shouldn't be like that. If it was set to peaceful the mobs shouldn't even be spawning at all. It's a very annoying bug that I have yet to find a fix for. I was thinking it might have something to do with a plug-in but it hasn't happened before. It was just after I made a new map. I've stopped the server, reloaded the server, and pretty much get the same problem. Help please! It's annoying!

 

If you want to ensure mobs are not spawning, try a mob disabling plugin such as THIS. Also, mobs only spawn in the dark, so it is recommended to light up the server.

I hope I was of some help,

Symbiosis

 

I had this same problem with my own private server.

You have to go into your server file and put

difficulty=0 AND
spawn-monsters=false . This one will be true as default.

This will fix the problem.

 

Thank you crypttr, that resolved this issue