And as of Jan1 2020, its broken again. As previously posted:
EndDate eq null (Didn't work)
EndDate eq 'null' (Didn't work)
EndDate eq to the expression null (Didn't work)
EndDate eq to the expression 'null' (Didn't work)
🤣 Here I am... HOWEVER, EndDate eq 'null' doesn't error out (only one that doesn't) but won't filter anything unless the string null is in the column/cell.