I2C BSL Rx Password command is acknowledged with 0x52 (wrong checksum)

With MSP430FR68791 I enter the BSL by sending the BSL sequence (RSTN/TEST).

After this, I send the Rx Password command frame. This frame is always acknowledged with 0x52 (wrong checksum).

As I use the Rx Password frame which is shown in sla550e (Revised May 2016) I assume the checksum should be correct.
I have checked the checksum with a tool from the forth Byte (CMD=0x11) to the last byte before the checksum and I get the same result (0xE69E)

This is the frame I send:

80.21.00.11.
FF.FF.FF.FF.
FF.FF.FF.FF.
FF.FF.FF.FF.
FF.FF.FF.FF.
FF.FF.FF.FF.
FF.FF.FF.FF.
FF.FF.FF.FF.
FF.FF.FF.FF.
9E.E6

The Rx password frame shown in document sla550e had one error because the length was given as 0x33, but it is 33 (dec).
I have corrected this, but the frame is still acknowledged with 0x52 (wrong CRC).