I decided to test some of the stuff including the armor, and it seems to have some kind of ghost-like white shadow, that follows the character movement, not sure if this is caused by other mods i'm running.
Using Forge 40.1.20, with a modlist which can be found here https://pastebin.com/F3acdXKR
image proof https://imgur.com/gE1A2wN

latest.log
Not using optifine. I suspect this is conflicting with mekanism since the MekaSuit has similar properties when worn, it makes the character movement weird, so it could also affect the infinity armor. will test with only those two mods

Not mekanism by the looks of it, so it's probably something else. Still, is the character turning white when putting on the helmet intended?

I will try to fix it

It would be better if log could be provided :D

Did you have optifine installed? I wonder if it's an optifine-relevant problem.

The log seemed to report nothing special... But if MekaSuit is being rendered with the same problem, then it might be something with vanilla or forge.