Hi Ze33,
I have the same issue!
At more than a month ago, I received my EAD approval letter. My Online Status also showed approved EAD. However, in the late December, it changed back to Finger Print completed just like you posted.
I was hoping something positive that caused this change. Because, I assume if nothing changed, I should have received the card by now which is more than 1 month later when I received the EAD approval letter. Or it could be just a bug in their system. I don't know.
I was interviewed in July and waiting for the decision ever since.
Anyway. Let's hope the best.