when a vanished player log off. They became briefly unvanish before log off the server.

What happens on a clean CraftBukkit install?

That was another clean install. 😣

I will try craftbukkit in a bit.

that is if you are in front of vanished players.

and no, i don't have - vanish.see

Output of your latest server startup please?

[14:58:58 INFO]: Starting minecraft server version 1.7.9
[14:58:58 INFO]: Loading properties
[14:58:58 INFO]: Default game type: SURVIVAL
[14:58:59 INFO]: This server is running CraftBukkit version git-Spigot-1543 (MC:
1.7.9) (Implementing API version 1.7.9-R0.3-SNAPSHOT)
[14:58:59 INFO]: Server Ping Player Sample Count: 12
[14:58:59 INFO]: Using 4 threads for Netty based IO
[14:59:00 INFO]: Generating keypair
[14:59:00 INFO]: Starting Minecraft server on :25565
[14:59:01 INFO]: [PermissionsEx] Loading PermissionsEx v1.22.6
[14:59:01 INFO]: [VanishNoPacket] Loading VanishNoPacket v3.19.1
[14:59:01 INFO]: *** Beginning UUID conversion, this may take A LONG time ****
[14:59:01 INFO]: Preparing level "world"
[14:59:01 INFO]: -------- World Settings For [world] --------
[14:59:01 INFO]: Chunks to Grow per Tick: 650
[14:59:01 INFO]: Clear tick list: false
[14:59:01 INFO]: Experience Merge Radius: 3.0
[14:59:01 INFO]: View Distance: 10
[14:59:01 INFO]: Item Despawn Rate: 6000
[14:59:01 INFO]: Item Merge Radius: 2.5
[14:59:01 INFO]: Arrow Despawn Rate: 1200
[14:59:01 INFO]: Allow Zombie Pigmen to spawn from portal blocks: true
[14:59:01 INFO]: Zombie Aggressive Towards Villager: true
[14:59:01 INFO]: Mob Spawn Range: 4
[14:59:01 INFO]: Nerfing mobs spawned from spawners: false
[14:59:01 INFO]: Cactus Growth Modifier: 100%
[14:59:01 INFO]: Cane Growth Modifier: 100%
[14:59:01 INFO]: Melon Growth Modifier: 100%
[14:59:01 INFO]: Mushroom Growth Modifier: 100%
[14:59:01 INFO]: Pumpkin Growth Modifier: 100%
[14:59:01 INFO]: Sapling Growth Modifier: 100%
[14:59:01 INFO]: Wheat Growth Modifier: 100%
[14:59:01 INFO]: Entity Activation Range: An 32 / Mo 32 / Mi 16
[14:59:01 INFO]: Entity Tracking Range: Pl 48 / An 48 / Mo 48 / Mi 32 / Other 64

[14:59:01 INFO]: Random Lighting Updates: false
[14:59:01 INFO]: Structure Info Saving: true
[14:59:01 INFO]: Sending up to 5 chunks per packet
[14:59:01 INFO]: Anti X-Ray: true
[14:59:01 INFO]: Engine Mode: 1
[14:59:01 INFO]: Hidden Blocks: [14, 15, 16, 21, 48, 49, 54, 56, 73, 74,
82, 129, 130]
[14:59:01 INFO]: Replace Blocks: [1, 5]
[14:59:01 INFO]: Alternative Hopper Ticking: false
[14:59:01 INFO]: Hopper Transfer: 8 Hopper Check: 8 Hopper Amount: 1
[14:59:01 INFO]: Max Entity Collisions: 8
[14:59:01 INFO]: Custom Map Seeds: Village: 10387312 Feature: 14357617
[14:59:01 INFO]: Preparing start region for level 0 (Seed: -2055214235176400434)

[14:59:02 INFO]: Preparing spawn area: 24%
[14:59:03 INFO]: Preparing spawn area: 92%
[14:59:03 INFO]: [PermissionsEx] Enabling PermissionsEx v1.22.6
[14:59:03 INFO]: [PermissionsEx] Initializing file backend
[14:59:03 INFO]: [PermissionsEx] Permissions file successfully reloaded
14:59:04 INFO: [VanishNoPacket] Enabling VanishNoPacket v3.19.1
14:59:04 INFO: [VanishNoPacket] Colored nametags enabled, but I couldn't find
TagAPI
14:59:04 INFO: [VanishNoPacket] For awesome colored nametags on vanish, visit
14:59:04 INFO: [VanishNoPacket] http://dev.bukkit.org/server-mods/tag/
14:59:04 INFO: [VanishNoPacket] and download TagAPI.jar
14:59:04 INFO: [VanishNoPacket] 3.19.1 loaded.
14:59:04 INFO: Server permissions file permissions.yml is empty, ignoring it

using spigot 1.7.9-r0.3, pex and vnp. that is all. just weird to see vanished player appears briefly when they log off in front of players with no vanish.see