I don't know the reason as i'm not a resourcepack maker/expert but i found a fix to it by deleting "redstone_block.png.mcmeta" at assets>minecraft>textures>blocks so the reason is behind the chain this block has.
AE2 version: "rv6-stable-7" (1.12.2)
CTM: "1.0.2.31" (1.12.2) Note: this bug only occur with version 0.3.2.22 and above, version 0.3.2.20 doesn't have it so the problem started after that version.
CTP: "1.2" (1.12.2)
Forge: "14.23.5.2847" (As i'm playing E2E and found the issue in it, i used the same Forge version from it to test) but it also happens with the latest version (14.23.5.2860)
Screenshot:

MultiMC test instance: Earth-T (1.12.2).zip

So that's it, this is the all info i collected and the fix for this bug. I know version 1.12.2 are (Probably) not supported anymore but i just wanted to let the dev and users of this mod to know the bug and the fix. Sorry about anything.