Sleeping bags and beds are currently broken. Can’t place them on foundations. I think everyone knows this but i just wanted to put it out there.
I have a thread up on this issue, you may want to post in there too. it’s big bold title thread that says can’t place sleeping bags
You can, the easiest way atm is if you stand beside the foundation on the ground and then place it on the foundation. It needs to hover a bit above so it does not collide with the foundation in any way. You can also manage it when standin on the foundation, but it needs time and might frustrate you.