to_string function has changed

[StuartLayton]

The to_string function has changed this past weekend.   It seems to be stripping out null fields!
eg: If you To_String this value: 

{
"consentLevel": "Monthly",
"consentType": null,
"from": null,
"to": null
}

you only get the consentLevel back

{
"consentLevel": "Monthly"
}

What has been changed?

[reinc]

Hi @StuartLayton, 

Welcome to Google Cloud Community! 

Check this Application Integration release notes for announcements about new or updated features, bug fixes, known issues, and deprecated functionality.

It is recommended to reach out to our Google Cloud Support team. Their expertise can help simplify the process and answer any specific questions about configuration you may have.

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