[Hot Issue] LVDS DS90UB914 communication problem

There is a problem about the communication of LVDS between Serialize and Deserialize. As shown below figure, the Host can communicate with Deserialize but can't communicate with Serialize. I think it is work fine to communicate between Serialize and Deserialize because Serialize transmit own ID to Deserialize when it connected to Deserialize. To read the register values of Serialize by Host's command is failed. Please help.