CHIP tool can not send command when OTBR and Ubuntu PC(within CHIP tool) restart

Dear sir:

        When I first use CHIP tool in my Ubuntu NB, I can commission bulb(52840) through OTBR(Pi4+52840 RCP) successfully, besides, I can use CHIP tool to control bulb on/off.

        But when I reboot Ubuntu NB and OTBR, I can't send any command to bulb, how can I fix this issue?

        This is CHIP tool error log:

        

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