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ADS7028: In Manual mode, CHID incorrected

Part Number: ADS7028

Hello, we are measuring analog voltages using CH0~CH2 of ADS7028.
We select manual mode and write CHID to the CHANNEL_SEL register. Set the APPEND_STATUS[1:0] bits of the DATA_CFG register to 01b and measure data with CHID.
In the experiment, When AIN2 was set to CHANNEL_SEL, and the data was measured two cycles later, the data for AIN0 was returned.
I will attach the waveform of the oscilloscope.

Is this a bug in the silicon, or is it because the CHID is not properly set due to some noise?
Could you please help me with my question?