Introduction

I have encountered a rendering error on the XP bar, that only seems to occur in multiplayer, when Auth Me is installed. I use a rather large stack of client-side mods, so it took me a while to track down exactly which mod was causing this particular rendering bug.

I am now certain Auth Me is responsible for this bug. I made a new instance of Minecraft with Fabric, with only Mod Menu installed. The bug did not show up there. Then I added Auth Me. With just Auth Me and Mod Menu installed, and no other mods at all, the bug did show up.

Steps to reproduce

1. Have Mod Menu and Auth Me installed.
2. In Video Settings, set the GUI Scale to 4.
3. Install the resource pack VanillaXBR.
   
4. Log onto mc.hypixel.net, and run the command /play arcade_pixel_party to join a game of Pixel Party. This game uses the XP bar as a countdown timer.
5. Wait until your XP bar is changed to be full, and then look at the right-hand end of the XP bar.

With Auth Me installed

There is an extra nubbin of pixels being rendered at the far right side of the XP bar.

Without Auth Me installed

That little nubbin of pixels is gone. This is the expected, correct behavior.

Additional reproduction notes

• The erroneous extra nubbin of pixels does not appear when the XP bar is not full.
• The erroneous extra nubbin of pixels seems to only appear in Multiplayer.
  • I tried to get the bug to happen in Singleplayer, without success. I used commands to give myself a high experience level, and then fill my XP bar as far as it would go, but the extra nubbin of pixels never appeared.

Version

• Minecraft 1.21.4
• Fabric 0.16.10
• Auth Me v9.0.1+1.21.4 (Release)

Agreements

• I am running the latest version of the mod.
• My version of Minecraft is supported.
• I have searched for and ensured there isn't already an open issue regarding this.