The map viewer filter isn't working as expected for a number field with a domain

[BrandonGuo]

I have a small integer field "Approved", with domains "0" as "No", "1" as "Yes". 

In map viewer, I created a filter "Approved" is not "Yes". 

But the map also filtered out records where "Approved" is empty. 

After applied the filter, records with empty "Approved" field also filtered out. 

[ChrisUnderwood · Accepted solution]

Hello @BrandonGuo , you might want to read BUG-000162236 to see if that helps with your understanding of what you are seeing.

https://support.esri.com/en-us/bug/the-is-not-operator-in-the-arcgis-online-map-viewer-fil-bug-00016...

[BrandonGuo]

Thanks, condition group solved the issue.