I just finished a pretty major bathroom floor repair due to a leaky plastic part behind the toilet. Dealer called it a vacuum break. The sinister thing is the it leaked only enough to drip down the back of the toilet and work its way to the wood below the tile. Over the years, it completely softened the toilet base in an eight inch radius.
This caused the rubber black tank flange gasket to fail letting noxious gasses into the coach.
Does your toilet wabble?
Do yourself a favor and just remove the toilet and fully inspect the rubber gasket, flange and floor. It's good practice and also teaches you about this very critical part of coach ownership.
Make sure you dump and fully rinse your black tank before removing the toilet. I also suggest filling the black tank 1/4 full of fresh water and add the treatment. It makes a huge difference in the smell factor.