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TUSB7320: PWRON#1 is changed to High abnormally by plugging in/out USB port

Part Number: TUSB7320

Dear TI

As I know with EEPROM connected on I2C port of TUSB7320, TUSB7320's configuration can be programmed.

And at my design I did not use EEPROM and I2C port is pulled down to GND directly(actually 0 ohm series resister are located between SCL/SDA pin and GND).

So I expected PWRON#1 will not be changed during the operation.

But if USB memory stick is plugged in and out several times suddenly PWRON#1 is changed to High so finally VBUS is cut and USB memory stick is not recognized.

Could you please let me know why PWRON#1's status is changed and how to avoid it?

Thanks a lot for your support in advance.

Best Regards,

YK Lee