Was doing F32 textures and found out that:

charged_side for EV Charging Bench looks like IV tier charged_side texture.
charged_side for IV Charging Bench looks like HV tier charged_side texture.

@CrossVas do you see these "texture packages.json" these are basically the paths that ic2c loads.
And when i make a ic2c build it basically compares all textures and removes all textures that are 100% duplicates.
You can disable it easily by just changing the locations themselves.

Here is a texture pack where all compression/deduplication is disabled.
https://github.com/TinyModularThings/IC2Classic/wiki/1.19.x-ResourcePacks#temp

Here is a GIF for better understanding of what I was talking about:
https://imgur.com/JDZBMVC

EDIT: The pack you provided also has this problem. Using wrong path/textures.

yeah looks like there is 1 wrong texture.