I am a physics student applying to graduate school this fall for the 2024 fall cycle. This summer, I asked my recommenders in advance if they would write a recommendation for me. In particular, one professor said yes. This past week, I made profiles for all of the schools I am applying to. The next morning, I received emails from all of the schools that my professor had submitted a recommendation.
This is very strange to me, as the letter is not due for over 2 months, and I have never seen a professor do this. Should I be worried, or is there a reasonable explanation for this? I feel it is not tactful to ask the professor what happened.