[SD] [SE] Sims won't enter Sauna/Hot Tub/Hotspring for woohoo

Not sure how helpful it is, but I noticed something the last few times I was playing: my sims have a big house and garden, and they have a hot tub and a European style sauna in a small hut in their garden. The lot also has a treehouse. (Only the sauna and the snowy escape hot springs are broken for me, the hot tub works). 

When my sims are sitting at a table, aka, on separate chairs, all possible woohoo interactions in the social menu appear as "!! WooHoo". I get "!!Woohoo in Shower", "!! Woohoo in Hot Tub", "!! Woohoo in Treehouse" as well. That makes sense, because the two exclamation marks before an interaction signal that the sims need to get up/change position to do the interaction (sitting down, they also appear on "!! kiss" or "!! Hug"). The broken sauna woohoo interaction option never gets exclamation marks. It is always "woohoo in sauna". Even when sims are sitting down, sitting in the hot tub etc. It's like the game doesn't understand whether or not sims are sitting or standing for this interaction.