Training never finished
Hi,

My last workouts never end correctly, he gets stuck at this stage:
![Image](https://user-images.githubusercontent.com/49459897/136842870-f279377b-cb4e-40e4-938f-e44f5d6dd417.png)
If I force a ctrl+c it ends, but I'm afraid to kill some processing. I leave it for hours and this stage is never changed. Any suggestions for this issue? Or is it something normal?

Environment: 
JupyterLab
NeMo 1.3.0 (Previous also have the same problem)
GPUs: 3
Python: 3.8
OS: Ubuntu