Noisy Lippert leveling jacks.

Who else is in my situation? We have a 2015 Winnebago Vista with Lippert's hydraulic leveling system. Over the last year and a half, I've followed their advice and added 2 containers of Caterpillar's hydraulic oil additive and STILL have popping noises from my levelling system. I've been stewing about it just putting up with the noise but now our friends just bought a new Class A with what appears to be an identical system that doesn't make any noise at all. We park side by side and ours 'pops' while theirs is silent. My impression is that Lippert realized they used a faulty material for jack seals and has since begin using a better seal.