Information

Full output of /ess version:

>.... [19:57:30 INFO]: Server version: 1.15.2-R0.1-SNAPSHOT git-Paper-282 (MC: 1.15.2)
>.... [19:57:30 INFO]: EssentialsX version: 2.17.2.0
>.... [19:57:30 INFO]: LuckPerms version: 5.1.15
>.... [19:57:30 INFO]: PlaceholderAPI version: 2.10.6
>.... [19:57:30 INFO]: Vault version: 1.7.2-b107
>.... [19:57:30 INFO]: Citizens version: 2.0.26-SNAPSHOT (build 1959)
>.... [19:57:30 INFO]: EssentialsXProtect version: 2.17.2.0
>.... [19:57:30 INFO]: EssentialsXChat version: 2.17.2.0
>.... [19:57:30 INFO]: EssentialsXAntiBuild version: 2.17.2.0
>.... [19:57:30 INFO]: EssentialsXSpawn version: 2.17.2.0

Server log: https://gist.github.com/Tikkle/c3a6d03c3581d1ebae95eb3fefea9a8c

EssentialsX config: https://gist.github.com/Tikkle/e7630c4b1fb7255a04336b77f187e5e5

Details

Description
The chat-format section shows that the group placeholder should not be displayed, yet in-game the group tag is still shown before the user's display name

Steps to reproduce
all I did was change from format to group-formats and add my per-group chat formats.

Expected behavior
I expected it to looked like: (Admin) Tikkle

What happened was: [Administrator] (Admin) tikkle

Screenshots
https://imgur.com/a/pjZII6Q

You can use {USERNAME} instead of {DISPLAYNAME} if you only want to show the username and not the entire display name (prefix + username + suffix). Also, it looks like you might have more than one chat plugin installed, because the other stuff there doesn't appear to be in your config. Join the Discord server if you need more help figuring it out.

Issue persists even after switching to {USERNAME} tag

It seems pretty clear to me you have another plugin formatting your chat. Remove all plugins except for EssentialsX, EssentialsXChat, Vault, and LuckPerms and you should be able to figure it out. Good luck!

I've Isolated EssentialsX, EssentialsXChat, Vault, and LuckPerms on their own private server, the Issue still persists.

When I use the "chat.format" option this issue goes away, but I don't want to use that option because it doesn't fit what I'm trying to do.

As I mentioned before, please join the Discord server and ask for help in the Essentials channel. It will be much easier, and there are many very capable people there. We primarily deal with feature requests and bug reports on Github. Chat is one of the most stable components of Essentials, so this is definitely a usage/configuration problem on your end, and almost certainly not a bug.