Howdy Seung Joon Lee,
Welcome to the e2e forums! That is an interesting issue, as the temperature configuration register should change with the SPI write operation. Is it possible for you to send an oscilloscope capture of the write operation, just so we can cover all bases. Have you tried to write any other value besides 0x0000?. In the meantime, I can experimentally verify the register write, and provide the capture and results.
Best Regards,
Matt