Hi @san san lee ,
Sorry for the inconvenience that this may have caused you, to make your voice heard I suggest you provide feedback to Microsoft by using the feedback option within Office 2016:
How do I give feedback on Microsoft Office?
https://support.microsoft.com/en-us/office/how-do-i-give-feedback-on-microsoft-office-2b102d44-b43f-4dd2-9ff4-23cf144cfb11
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(If the reply was helpful please don't forget to upvote or accept as answer, thank you)
Best regards,
Leon