Here is a trick I learned when I had a front seal on a motorcycle fork start to leak. With the jack extended get a piece of 35mm film, you know, the stuff you use to load in a camera! Take a piece, a couple of inches long and slide it up the shaft, under the seal several times (all around the seal). Often, this will dislodge any debris that can be causing a leak.
Wipe everything down and watch to see if it continues to leak.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor