Texture alpha is not rendered correctly sometimes

[BuyMyMojo]

What I did / Steps to reproduce

Create a powered repeater, redstone torch or comparator

Expected result

Render correctly

Actual result

Two pixel transparent section on all lit redstone torch objects

Context

1.7.2-cli

Windows 11

Minecraft 1.18.2 + fabric

Resource pack is mattbatwings pack from YouTube, attached here because download requires joining the discord
MattPack1.18.zip

Recordings:

• Repeater
• Torch
• Comparator

[TBlueF]

The lit-redstone-torch texture in that resource-pack has two pixels left and right that seem to be somehow differently stored than the other pixels .. this seems to confuse the shader.
My guess would be that this if-statement in the shader is not triggering for some reason.
Needs more testing.