EssentialsX version (run /essentials): 2.0.1-bSNAPSHOT

Server software (run /version): git-Spigot-00128b5-558c5a3

Details:

The vanish command does not properly hide players from all entities, just players. When a user uses vanish, they can still be attacked, for example, by hostile mobs. This can be problematic since it can give away a vanished players presence. Of course, using the potion effect will hide the players from these other entities. However, this is not very useful since it also hides the player from other users with vanish.see enabled (it does not work with the potion effect).

Either fixing vanish itself to hide players from entities, or making it so that vanish.see will work on players in vanish using the potion effect would both be acceptable possible solutions. Please consider fixing this.