This is actually an intentional change that got implemented a while ago. There was a bit of discussion where it was decided that rooms were
too productive, since they gave both babies and KS, and it made it so people were less likely to do non-breeding RPs since they simply weren't as profitable. KS gains were removed from the rooms so people couldn't simply make back the room fee just from the breeding, and to encourage RPs in non-breeding room areas.