Well, it happened again. Somehow, ice melted on my hood, dripped down and around the j1772 socket, and froze. Except this time without the charging handle in the socket. So when I did plug in once I got home, it wouldn't seat correctly. I had to go inside to retrieve a hair drier.
This is what happened once before, where water dripped down onto the lock mechanism on the handle and prevented the release from being depressed- essentially locking the handle into the socket.