When editing Player Permissions using the dedicated GUI (playerPermissions.PNG), a problem of inconsistency occurs : permissions got updated until you log-out and return to server values (OP or Non-OP) when you rejoin back the server.

How to reproduce:

• Join the server and /op yourself.
• Access the Player Permissions GUI (Pause > Right Menu > Click your name) and change your Permission Level to anything other than Operator.
• Go Back > Resume Game and ensure permissions has been edited successfully.
• Log-out and rejoin back the server. All your permissions have been reset to OP.