Spectre Coils have broken textures when placed down
Minecraft Version 1.12.2
Forge Version 1.12.2 - 14.23.5.2796
Modlist: pastebin

Commenting to say that this is still happening as of mod version RandomThings-MC1.12.2-4.2.7.1

I can replicate this with all Spectre Coil types on machines from multiple different mods.

For what it's worth, I dug into the .jar the textures aren't broken because of a typo or anything. I know nothing about coding, though, so that's all I can tell ya.

Please let us see your logfile, otherwise it is hard to know what might have gone wrong.

can confirm the same visual issue with RandomThings-MC1.12.2-4.2.7.3.jar when placed on an Advanded energy cube from Mekanism-1.12.2-9.8.2.389.
Tested this with creative and was looking at the logs live there are no entries as far as I can see.

Unfortunately I can no longer provide a log file as this has mysteriously stopped happening for me. If it comes back, I will include a log.