Carpets Obstruct Bed

If you have carpet around your bed you can not sleep in it as it says "Bed Obstructed." Considering you used to Spawn on your bed and the bed didn't Obstruct it's own block Carpet (or snow for that matter) shouldn't be an obstruction.  

Removing the carpet removed the "Bed Obstructed" message.  

Edit: why was this marked "Resolved" with no comment?