Battery infomation

I just noticed on the information in my battery information of my MacBook Pro 16 2019.

first I check the battery information in the "power" tab in system report. in the battery information -> Model information, I can see the serial number of my battery. now when go to see that again I can't see the serial number. why it's gone? is it new update or something wrong with my new MacBook?

before I can view:

Model Information:

Serial number: FDXXXXXXX

Manufacturer: DSY

Device Name: bq40z651

Pack Lot Code: 0

PCB Lot Code: 0

Firmware Version: 0b00

Hardware Revision: 300

Cell Revision: 2309

.....

now I don't see the serial number.

anyone know this problem?

Thanks