June 2019 Update - Cannot Filter Null Dates

Prior to the June 2019 update, I was able to filter out null date values using the filter. However, that is no longer working. Has anyone else encountered this? Null is a valid value for this date column.

I have tested this in Power BI without the June 2019 update and it works as expected - that is, I can replace the null value or filter the table.

The below pictures show the columns. As shows, the null value is present. 

Even if I try to do a replace, it doesn't replace the value = Table.ReplaceValue(#"Added Conditional Column",null,#date(1999, 1, 1),Replacer.ReplaceValue,{"resolution_dt"})) 

I have confirmed that in the June update that you can still filter out the null values on a text field.

Is there a link to download the May 2019 version so I can keep developing until this is fixed? I have confirmed in another PBIX on a machine which did not update that this functionality works.