SN65DSI83: Questions for SN65DSI83 CLK output

Part Number: SN65DSI83

Hi Experts,

Our customer is using SN65DSI83 as the MIPI to LVDS converter application, during the board test, they found that the CLKN/CLKP output signal common voltage is different showing as below. They checked the schematic and PCB, but no obviously issues have been found. Could you help to check what's the possible reasons for this issue?

1. Customer's Schematic:

2. Abnormal CLKN/CLKP output signals waveform:

Thanks.