This is due to OVERFILL of fluid - it's designed to allow this to happen.
The container is not designed to be 'filled' to the top. If the leveling jacks are 'down', then the container will look very, very low, making you think it doesn't have enough fluid - but that's not the case. Most of the fluid is now out in the lines and pushing the legs down.
If the levelers are up, and stored for travel, the container will be 'mostly' full, as much of the fluid is now back in container.
If you have leaking fluid, you have too much fluid in your container - there would be no other reason for fluid to be pushed UP and thru the cap.
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada.... formerly Georgia, then NorthCarolina, now Alabama : )