DataGrid Advanced Filter "Is Empty" vs "Is Null"

I am currently working with the Radzen DataGrid which is fantastic. However, I am having a small issue with the advanced filter. When I filter on a string column with empty strings I don't get any results back. If I force those properties in my source data to be null I get values back for both 'Is Empty' and 'Is Null'.

I do not have the same issue with I use the Simple and Simple with Menu filter options.

The LogicalFilterOperator is set to And and this happens specifically when the property value is an empty or zero length string.

I was able to reproduce the problem with the advanced filter and IsEmpty operator and we will do our best to include fix in our next update.