Yep, I have the same thing going on. The first I heard it was in my driveway with the jacks down. The next day we left for a three day trip and didn't hear it. We got back home and there it is again. If this is coming from the jacks, my question is are the jacks loosing pressure. It's time to get under the MH and have the wife walk back and forth. Be sure to Post if you find anything...
2018 Thor Windsport 29M
2016 Harley Davidson CVO Road Glide
Life is Good!