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Asking for AIC3254 HP pop noise while power up

Hi Team,
 
Customer used the AIC3254 on the new project. And now we found the pop noise from the AIC3254 HP out.
Please help for the following design issues.

1.       Could you duplicate and provide comment how to improve the pop noise?

 
It can simply use the AIC3254 EVM-K to duplicate the pop noise.
Here is the steps that can duplicate on the EVM.

1.       Switch the SW2 to high. (internal LDO application)

2.       insert the earphone on the AIC3254 headphone J9 output.

3.       Connect the USB to PC. The pop noise will be heard at the power up. (disconnect USB, wait for 5 sec, connect the USB again, the pop noise will happen again)

 
Here is the customer’s schematic.
 
 
Thank you and Best regards,
 
Scott Hsieh