When using bedwarsproxy the starting level of the person is null or 0 instead of 1

[Caily-E]

Describe the bug:

When using BedwarsProxy in the lobby world the level is displayed as null or 0(not displayed) instead of 1 but when you play one game of Bedwars it gets normal

How to reproduce:

1.Setup BedwarsProxy on lobby
2.Join the lobby
3.Check the player level it should not display or shows nothing

Expected behavior
The default level of the player when he joins first it should be 1 instead of null or 0

Server info:

BedwarsProxy version: 1.2.4