Floating items above unclaimedworkshop

I changed jobs for my weaver to a carpenter mid job. Then the workbench becomes “unclaimed” Well I moved that far away and now I have a floating thread above the workbench.

Steps to reproduce.
HAve weaver make cloth.
Stop weaver when they have 2 spools of thread.
Change weaver to another job.
Move unclaimed workbench to another level in the game.