I have a 2005 Landmark and recently took it out of storage to use for the winter, we're snowbirds. I parked and raised the front to a desired level. I noticed approximately 10 minutes later the unit had slowly dropped down to it's lowest level. I raised the unit again, and again it dropped down slowly. The hydraulic fluid level in the reservoir is at the correct level and did not change. Couldn't find any leaks also.