Earlier today, my friend had his 2 slot STORM laser disappear. A few hours later, I was @ via rosso sec 3. I had SI, I was buying drones. My SI made my Rifle PE PA 2 red, so I took it off. I dragged it into my inventory. It disappeared. I looked around on the ground, checked my belt, relogged(to see if it had become a diff item). Finally I realized that it was gone. 100% gone. This seems to be a possible new bug. Usually the item that vanishes will become a pair of boots or stamina booster.

My friend never could find his STORM laser today, and I had to reassure him that I didn't have it.
The PA was not a big loss, and I'm ok with just buying another. Next time it could be a 5 slot dissy or something :P

Thanks, and hope the details I enclosed help.