[BUG] Random nametag crashes

[Panquesito7]

Description

When a player is granted the builder privilege, their nametag will change (this is part of the panqkart_modifications mod).

When a player joins a race, their nametag will be removed until they get back to the lobby.
However, if they have the builder privilege, they might not get the builder nametag. Once the privilege is re-granted, a crash may occur and the nametag might not be given properly.