I was looting on Grishino when I found a 15% gas canister in a yellow shed. I decided to go and fill it up at the town's gas station. When I got there, I went to loot some food from the room in the gas station, but found none. I went to go fill it but no option appeared, so I checked my inventory. It wasnt in my hands, the glitched slot next to your gloves (that has been reported before I believe) and not in any of my slots. Nothing. I went back on the road to find it and it appeared in my hands, so I went back before it disappeared again. So I ran up to the hill back and forth to see it happening each time. I eventually just said screw it and ran off to my camp. It never appeared again.