I'm using essentialsxchat and when I try to use group formats with LuckPerms the displayname of the group automatically added itself to the format.

How can I fix this issue?

This is an issue related to your chat-plugin and not LuckPerms.
Please ask in the M.O.S.S. Discord for support with EssentialsX and EssentialsXChat

Also heres my config:
config.txt