My 40 Foot Class A after a long sweeping right turn and an immediate left turn at 20 mph almost rolled over. I've made many left turns at a greater speed without that reaction.
??? Air Bags over inflated. Overloaded front axle - rear axle? Side to side load distribution.. Broken springs - shocks on left side. Do you have a Toad that could have a connection problem to RV? Something that is throwing ride control off. Time to crawl under vehicle or call mobile mechanic.