Type of bug

Other unexpected behaviour

/ess version output

Server version: 1.16.4-R0.1-SNAPSHOT git-Paper-388 (MC: 1.16.4)
EssentialsX version: 2.19.0-dev+85-e5db842
PlaceholderAPI version: 2.10.10-DEV-122
LuckPerms version: 5.2.96
Vault version: 1.7.3-b131
EssentialsXChat version: 2.19.0-dev+85-e5db842
EssentialsXSpawn version: 2.19.0-dev+85-e5db842

Server startup log

not relevant

EssentialsX config files

not relevant

Error log (if applicable)

No response

Bug description

If a group has only vanished members online, it's still in the "/list" tab completions even if a player can't see any players that belong to this group.

Steps to reproduce

1. Log in on the server
2. Make sure that there's at least one member of a certain group online, and all of the online group members are vanished and you can't see them
3. Type in "/list " and press tab
4. The list of groups that have any online members is displayed in the tab completions. It also contains the group that has only vanished players online.

Expected behaviour

A group shouldn't be exposed in the tab completions if you can't see any members of it.

Actual behaviour

A group is exposed in the tab completions even if you can't see any members of it.

This issue was reported some time ago (#3612) and was closed, but the bug appeared again and is present on the latest dev builds.