Forge version: 14.23.5.2838
Extra Bit Manipulation version: 1.12.2-3.4.1

The armor is rendered weirdly on Armor stands. It could be a cross-mod conflict, but in any case I'm sending you this. I actually fixed a bug like this recently on animania: capnkirok/animaniamod#318

It was fixed by setting this blend function after enabling blend:
GlStateManager.blendFunc(SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA);
If you need any more information, please let me know.

Also, just so you know, this bug is quite hard to reproduce and only occurs when looking form certain angles, and the angles change with time... it's weird.