Drivers side chirp as I go over bumps. Ride height has not been affected nor does the height change over night. So I am guessing not air system. What doesn't kill you is just bidding it's time.

Had similar noise when I had my RR, however it was more throttle related.
I suppose it could be similar movements of the engine going over a bump?
Mine was warped exhaust manifold and snapped studs.
New manifold, studs, gasket and loads of labour later much quieter.
Might be that?