I made my own code for YOLO.
It has made quite good detection and classification.

However, I train it more epochs and got little bit different result with my model after the end of the program.
The model can’t find any box in the photo.
For 200 test photos, it could find only 3. Fortunately, if the model finds the box, it is correct box.
So, I doubt whether it is overfitted or not.
If it is because of overfitting, how can I solve the problem?