Cody Score Suddenly Decreased

I've noticed today that my Cody score has suddenly dropped by approx. 600-700 point relative to 1 or 2 days ago. It also appears as if at least one correct solution that I had previously submitted simply vanished. Has anyone encountered this issue? Any particular reason why this would happen?

[HH]

OK. I'm now noticing that more point have been deducted from my score in the past hour and the "Number of problems solved" in my account is decreasing as well. What's going on???