Some of my rare mods are just vanishing from my inventory maming strike and argon scope

[crystilpop83]

I log in after Fortuna update and my maiming strike and argon scope are gone pls help 

[IllusionaryInnocence]

I had the exact same thing happened to me. Argon Scope was one of the first mods I got during the Shadow Debt event way back when, and I hadn't logged in since War Within, or rather around that time. I started playing again after Fortuna and after a few days I went to use my Dex Sybaris and noticed it had some mod points. Strange I thought. Checking for Argon Scope, couldn't find it in my list. Checked my mod station. Not their either. It even got removed from my Codex for some reason. I'm like 'wait I maxed that thing and used it as part of my build, where did it go?'

[crystilpop83]

I know cus if it was a mod I could still get I wouldn't care id just farm another  but I tried to build an atterax and my maiming strike just disappeared