The Case of the Disappearing Torches

I placed a torch from my offhand with nothing in my main hand and POOF. Gone. I tried again. POOF. Kept trying. POOF. I ran out of torches and crafted more. I tried with my main hand and it worked. I tried again with my offhand and POOF. It worked earlier with something in my main hand. Also I wasted torches to make the video so you're welcome. jk lol