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UB941/0 reset

Part Number: DS90UB940-Q1

Dear expert,

My system is UB941 + UB940. I find if reset UB940 with PDB, everything is OK after re-lock. But if reset UB941 and then re-lock, there are some CRC error for the first 2048 bytes video data received by screen. The data afterwards are OK. 

I saw below description for UB940 datasheet for Power Sequence. So this phenomenon is normal in theoretical? But UB941 send video data after LOCK is detected. Why there is still CRC error?

"Provide valid data from a compatible Serializer before power-up or apply reset"

And there is error also for the first frame SPI data which is also sent after LOCK is detected. Is it normal?

Thanks