[Mikendebbie]

David - my 2018 3921FB has hydraulic slides in the living room and the bedroom slide is a Schwintek slide. You need to include your model in your posts so you will get targeted answers. Different models have different slides.
The easiet way to fix this is to click on USER CP on the upper left of this page - then click on EDIT SIGNATURE and enter your RV and tow vehicle info.

I recently had an issue with my driver's side hydraulic leveling legs "creeping" down after a retract and a long time of inactivity, and I failed to "exercise" the system periodically. My issue turned out to be a "air bubble" in the system. Smart folks here on the forum recommended manually cycling the leveling system 5 to 7 times...completely up and completely down. This cured my issue. You may be experiencing the same thing - so (as dieselguy suggested) - run the system through several cycles and see if that solves the issue.