validation AP fluctuation and validation loss curve increasing

[hcmea]

Hello, I am training a custom dataset with YOLOX-nano model. I did not change the nano training parameters except the number of classes which is 1 for my dataset. The Validation AP 0.50:0.95 looks like this:

Is it normal to see these fluctuations?

The other issue is calculating validation loss to see if it is overfitting. Is anyone try to log validation loss? I modified the code a bit to calculate validation loss. But somehow it looks weird. It fluctuates a lot and it has an increasing trend.

And this is total training loss by the way:

What is going wrong? Does anyone have any idea to fix this? Thanks.

[wang1233211]

Did you solve it?