Thanks. I wasn’t aware of that idiosyncrasy.
There’s an extensive aftermarket of parts and mechanical enhancement for these, and a fix for the rear air suspension. It was very innovative at the time and it’s still very useful and practical, not to mention comfortable on the road. But, an airbag or hoses leaking or an airbag blowing out and disabling the RV can be a problem, so there’s a “quad bag” suspension now with redundancy. Guy out your way invented it and manufactures them. Fixes the problem, even uses cheaper more standard airbags. If one goes out you’re still OK because there are two per side.