You would need to prove the previous owner had the same problem and did not disclose this information. Very difficult and probably costly to do. Better to Calla good plumber. I have one if you need it..
ERA First Team
Its more scary if its a new home but either way just snake it out and see what happens. It might just be a random clog that will not show up again. Ive had this happen on my very, old home and a new home we just built. In both cases we have only had to snake one time to this point.