I had some more "episodes" with this today. Clutch pedal was getting spongy while driving. Only going down about half-way, so able to get under it with my toe and it would be fine for a bit. Kept driving around through the day and then pulling into a parking space I felt it go spongy again and wanted to check it. Oil on the clutch pedal arm and pad, even enough to pool on my all weather floor mat a tiny bit. Guess the master cylinder has given up at 38K. I'm outside of the powertrain warranty by 1 month so not sure if I should push the issue with Ford.
They wouldn't cover it under warranty for me. But its pretty easy to change out yourself. As well as reverse bleeding the system. Just be on the lookout for the nipple on the bottom line. It's likely to come off and cause leaks.