[ASR Training] Loss nan during training
**W0215 06:48:41.808522 140192834852672 x2num.py:14] NaN or Inf found in input tensor**


**Pytorch Lighting Parameters**


omit amp_level and amp_backend,only used precision=16 to enable AMP

#amp_level="O1",
precision=16, 
#amp_backend='apex'

though it enables AMP [Using 16bit native Automatic Mixed Precision (AMP)],during training it shows training loss nan with a warning message **W0215 06:48:41.808522 140192834852672 x2num.py:14] NaN or Inf found in input tensor**


**Learning Rate =2**


![image](https://user-images.githubusercontent.com/107035118/218989436-147d27a4-78c5-4d20-a422-ca77d7adb645.png)


**Additional context**
- Nemo Docker version nemo:22.12
- Multi GPU
