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.
Crawl underneath and check out your suspension looking for (air bags bleeding across to other side of vehicle or broken parts or bolts broken or missing or in my case hard plastic bushing was broke at sway bar mounting). Or take corner faster and then you'll have a good view of underneath that will then be in plain view if you roll it. But you don't probably don't want your underneath sunny side up.