I have a 2020 34g precept . The window is delaminating from the frame. The noise ( on my last 3. 1 passenger side and now the second drivers side was replaced under warranty. The entire window and frame. A temp fix is a small bead of sealant to stop the noise. It usually fails on the stationary panel vertical frame at the window center
2020 Jayco Precept 34G
Central Florida (East Coast)