CASE in WITH works is incorrect if some property empty

[mad]

Example of graph

        graph.traversal()
             .addV("Org").property("Name", "Org1").as("org")
             .addV("Person").property("Name", "Foo").as("p1")
             .addV("Person").property("Name", "Boo").as("p2")
             .addV("Person").property("Name", "Woo").as("p3")
             .addE("E").from("org").to("p1").property("e", true)
             .addE("E").from("org").to("p2").property("e", false)
             .addE("E").from("org").to("p3")
             .iterate();

Query 1:

MATCH (n:Org)-[r]-(p:Person)
WHERE id(n) IN [{nID}]
WITH p.Name as Name, CASE r.e WHEN true THEN 'Yes' WHEN false THEN 'No' ELSE r.e END AS Work
RETURN Name, Work

Expected:

[{Name=Foo, Work=Yes}, {Name=Boo, Work=No}, {Name=Woo, Work=null}]

Actual:

[{Name=Foo, Work=Yes}, {Name=Boo, Work=No}]

Query 2:

MATCH (n:Org)-[r]-(p:Person)
WHERE id(n) IN [{nID}]
RETURN p.Name as Name, CASE r.e WHEN true THEN 'Yes' WHEN false THEN 'No' ELSE r.e END AS Work

Work is correct:

[{Name=Woo, Work=null}, {Name=Boo, Work=No}, {Name=Foo, Work=Yes}]

[dwitry]

Fix pushed to tinkerpop334 as well.