ms-allow-popups Error in Office Add-in

Hi Team,

We are building office Add-in for Word, power point, excel and Outlook.

In all of these add-ins when we launch the add-in, we get the following console error in chrome:

Error while parsing the 'sandbox' attribute: 'ms-allow-popups' is an invalid sandbox flag.

The file where this is reported is OsfRuntimeWordWAC.js:12

I feel that the attribute  value is added by Microsoft in the iframe sandbox attribute.

The add-in works fine but we need to remove the console error. Could you please let us know what needs to be done to remove the same.

Awaiting your response.

Regards,

Divisha