It could be the same or similar to what I discovered. I had a wet carpet and figured out my door membrane was fine. So I opened the door and sprayed huge amounts of water to the glass with a garden hose. What I then discovered is shown in the picture. I renewed that rubber gasket and since then it is dry. My recommendation is doing the same spraying with the open door and you quickly find out what the culprit is.
https://i.imgur.com/AcTrB4l.jpeg