I don't know if it lacks info on the wiki about this, but I better tell all the events:
I'm currently making an ascended heavy armor (Zojja's, to be specific), creating piece by piece. Recently, I got a Chest of Malicious Shoulders on fractals and although I already had made the shoulders, I read that salvaging an ascended armor will give you the insignia back. so I chose the heavy shoulder, changed it on the mystic toilet to Zojja's, then salvaged it and... got only a Lesser Vision Crystal and a Ball of dark energy.
Eventually, lightning struck twice, and I got an Chest of Assaulter Gloves. So I decided to to the opposite: made the gloves in Zojja's, switched my crafted gloves by my new ones, salvaged the crafted one and... again, only a Lesser Vision Crystal and a Ball of dark energy.
I don't know if this is a glitch or if it's how it's supposed to be. In the wiki, it says that you get the insignia by salvaging ascended, but I don't know if that "get" means "always get" or "chance of getting". Can anyone enlighten me?