When retracting the 6 jacks with all slides in I'm having an issue where the jack stops coming up and I have to release the button and let it set a few seconds than start again. This can happen several times during the retraction and happens with all 6. My fluid tank is full upon full retraction of all slides and jacks. I've had the system checked and they claim no issues found. Suggestions on what to check or do. This is on a 2019 Grand Design 310. thanks