Azure ML experiment run 70- driver log not printing after a few epoches

Question

I am training a deep learning artificial neural network model, usually the run submitted to the Experiment will show all the model running logs in 70-driver-log of 'outputs + logs' tab, but starting yesterday, the logs show only a few lines of logs and stop printing. I can still see the model is running since the 'metrics' tab is showing the loss and accuracy results.

And another weird thing is that after model training finished, the model is not saved.