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BQ40Z50-R2: CHG FET Disable issue

Part Number: BQ40Z50-R2

Tool/software:

Dear TI expert,

    I disable the FET_EN and use CHG_FET_TOGGLE and DSG_FET_TOGGLE to test the FET in TI batterymanagement sudio SW.

     No issue occurs for DSG FET control ,which means the DSG pin changs with the command, high voltage is about 27V, low voltage is about 0 V.

     But I found issue when disable CHG FET  and the CHG pin is about 8 V, this voltage can't disable the CHG FET, but no issue when enbale the CHG FET, the high voltage can reach 27V.

     can you advise the possible cause for this case?