Disappearing Phracking Kit

[anonymity]

Not sure if this is a bug or just something I did wrong in game, but: The "Phracking Kits" are supposed to be permanent in inventory, not just one-time use, right? For a long time, I had no problem with this after buying a Yakashima Nano-Probe (the +6 one) and taking any number of plant jobs. Then I went on a plant job and discovered the kit had disappeared. I bought a new one, but this one ended up disappearing after one use too.

Why would this happen? Is this a bug? Are these items consumed and I didn't know it? Is it something else?

[fallen]

anonymity - Phracking Kits have a 2% chance of being damaged during jobs that use them. If so, this is stated in the aftermath of the job as "the Phracking Kit burns out while you were using it."