About Essential UUID

I am currently using BungeeCord and Spigot,
have set online-mode=false in my server PROPERTIES,
and have set bungeecord: true for the spigot.yml .
However, probably because I have set online-mode as false,
it is recognizing UUIDs as an offline uuid.
This is resetting player's currency everytime they change their nickname.
Do I need to install another plugin to sync the economy with the online UUID?
(or is there something that I am missing to make this work?)