Yes. Unofficial TOEFL scores sometimes change when official scores are reported.
I’ve had some reports from TOEFL test-takers that their “official” reading and listening scores are different from the “unofficial” scores seen at the end of their test. I don’t know why this occurs, but it does. Perhaps score equating (for new test forms) is being done some days later due to the removal of unscored R and L questions.
If you have experienced this, please leave a comment below. If you haven’t experienced this, leave a comment as well!