Metrics went way down during Kaggle submission

I have been working on this competition from Kaggle , I just made the submission, and turns out my score was really low.

Note the competition evaluate on the basis of Mean F1 Score, I used the F1 score metrics with average = micro. Turns out when I submitted my score was really low but it was good during training. I can’t figure out where I am making the mistakes, can anyone help me with this
Screenshot 2021-02-12 at 5.53.10 AM