Information

Full output of /ess version:

Server version: 1.15.2-R0.1-SNAPSHOT git-Paper-385 (MC: 1.15.2)
EssentialsX version: 2.18.0.0
PlaceholderAPI version: 2.10.9
LuckPerms version: 5.1.93
Vault version: 1.7.3-b131
Citizens version: 2.0.27-SNAPSHOT (build 2072)
EssentialsXChat version: 2.18.0.0
EssentialsXSpawn version: 2.18.0.0

Server log: there's no errors in the console - not relevant

EssentialsX config: https://gist.github.com/piotrskibapl/901bde367422ed7422ac6952f71a609b

Details

Description
The "/kit tools " command exposes all vanished players by tab suggestions.

Steps to reproduce

1. Log in on the server
2. Make sure there's another vanished player you can't see
3. Type in "/kit tools " and press tab
4. You should see the vanished player username on the tab completions list

Expected behavior
The vanished player should be hidden from the completions

I cannot see any possible way this is happening, it could be an upstream bug?

@piotrskibapl Could you update to the latest build and see if this is still an issue?

Right, it looks like this bug is not present on the latest build anymore.