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TUSB4020BI: USB memory is recognized on one side only

Part Number: TUSB4020BI

Hi Sir,

In my schematic, Only one USB memory is recognized when the PC is connected to S818 and the USB memory is connected to J8 and J9.

However, USB memory will be recognized no matter which side is installed on J8 or J9, but only one side is recognized.
So it doesn't seem to be a connector problem.
I wanna request a friendship to you and want to send you the schematic in private.
Please help me to analyze this issue.

Thanks.
Regards,