Well i have that issue if I'm using the wrong floor or if you are using a passable material such as curtains, or pillows.... They don't click becasue they are somehow see-through, i had this issue once with one of my beach rooms, i had a nice sitting area over the rocks and everytime I need to get up i have to click on the ocean or on a solid shape so I guess deva should fix this issue and make them all clickable