Slight GUI replace the transparent pixel on texture into another "transparent" pixel (and acting weird)

[NathZen]

Describe the bug
All texture that's on transparent will replaced by something unknown

To Reproduce
Steps to reproduce the behavior:

1. Apply Shader (any. "Internal" Shader can be used too)
2. Open chat

Expected behavior
Doesn't add that weird transparent thing on textures

Screenshots

Player.Head.bug.SlightGUI.mp4

Additional context

Already Tested without SlightGUI, and got no bug
Resource Pack doesn't matters. Only when using Shader
Fabric 1.16.5
Slight GUI v1.7.1

Player head

Player head w/ open chat

Player skin

Player skin w/ open chat

Dropped items