Grass Floor won’t support anything

Hi, my grass floors aren’t supporting my workbench or baskets or anything else. Items sink through the floor and remain red, not allowing placement. Floor is in a scaffolding if that makes a difference. If I move the object I want to place to the very edge, so it is directly above the very edge of the scaffold, it will place if I fiddle with it a lot. Whatever I’m placing will be hanging over the edge though.

I’m playing one an Xbox one X with the lastest grounded update from a few days ago.