UIM - Plank sack turned into a plank?

https://preview.redd.it/yjrv8gegukie1.png?width=1598&format=png&auto=webp&s=e53c0f749ebc7da1d143670ff09e815937bd507d

my plank sack was empty, I had inv full of mahog logs, used the saw mill, then my plank sack turned into a plank?? I was keeping it bottom right and for sure didn't destroy it or anything. Nothing to show in chat log except me obtaining it. Used for 6 contracts before this happened, any idea what's going on?

EDIT: Turns out I was a 2head and actually just dropped it gg no re I'm gonna go crawl into a hole now