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SPIM transaction is limited to 255 bytes on nRF52840 / nRF Connect SDK 1.5.1

Dear Nordic support, 

Could you please give an advice regarding usage of Zephyr SPI driver / NRF SPI driver with Nordic nRF52840?
I've faced with the issue that driver can't transfer (particularly, receive) more than 255 bytes on transaction. As I remember, previous generations of Nordic SoCs (e.g. 52832) have this limitation, but 52840 has 16-bit .CNT registers and should work correctly.
What's going wrong and how we can correct this?

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