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BQ40Z50-R2: Manufacturer access only returns operation status

Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: BQSTUDIO

Trying to read MAC ChemicalID  and I am only getting MAC OperationStatus

When using an I2C/SMBus SILAB driver:. 

I am writing on SMBUS the data 0x44 0x06 0x00 And when i read address 0x44 I am always getting 0x06 0x54 0x00 0x87 0x01 0x00 0x00 which I decode to be Operational status with data 0x00000187

Reading some of the registers described at 14.1.2 to 14.1.70 returns a value I am expecting so I know that the SMBUS interface I am using works on the gas gauge. 

When using BQ Studio:

Using BQ studio registers tab and pressing the <chem id> button i get the correct value I selected.

Using BQ Studio Advanced Comm SMB tab I am getting the behaviour I described above.

How do I access a MAC register other than operation status ?