So I was playing with some friends and they summoned one of the boxes from the skills (forgot what it was called) and then put a red anchor plank on it. Then the sham spawned another box then the other one disappeared then the red anchor plank was able to move once it hung off from the box.
And It wasnt from the map.
And it also was able to MOVE if I runned on the side of the plank and pushed it across the ground. It wasnt in air or anything.
?

It's a Companion Crate, and.

1. If you try to spawn another companion crate, the 1st one will disappear.
2. Yes, the b anchor plank does that if you spawn the board ON THE crate and then spawn the crate at another place.

Not excatly a bug.