This anomaly applies to IC Rev. Engineering B, build codes QIAA-BA0, QIAA-BB0, CKAA-AA0.
The last byte received in the RX buffer is always equal to the value of the second last byte.
SPIM3 operating at 32 MHz.
SPIM3 not working.
If the application allows, use 16 MHz. If the external SPI slave allows, read one additional byte and ignore this last byte.