The thread reads like a familiar story.....
Airmatic leaks in struts do occur and can be observed with those funny condition such as, one morning when it was cold the car was low in the right rear, but then leveled after I started the car.
Then it happens at the wrong time, or too often and a valve, compressor get replaced. The next time, if the mechanic can not find a leak but deceides to replace a airmatic strut - the problem stops. This is cetainly not the type of issue when I would say "replace all the struts just in case".
I think leaks in the strut can be increased & reduced by conditions of temperature and position. Only after I replaced the correct strut did I see the problem go away. To bad there is not a better way to expose the defective part. I wonder if STAR Diagnostics can "exorcise the parts to show the issue" somehow?
Airmatic has such a great ride and we all know the gremlins that can hide in the parts.