In manual optimization, loss=NaN is displayed in progress_bar

[tchaton]

🐛 Bug

Please reproduce using the BoringModel and post here

To Reproduce

Expected behavior

Environment

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Additional context

[ayushm-agrawal]

@tchaton, I note the Nan issue in this notebook as well. I am not using manual optimizer.

https://colab.research.google.com/drive/1P06xssrVeZJBjHnlGEke2laoSWNxE-2h?usp=sharing