Wrong/No completion for field constraint and bind variable in JBDS Drools Rule Editor

Issue

When I write a rule, code completion feature does not work correctly.
1. No completion for the second constraint.

rule "Your First Rule"
    when
    BusinessCardHolder( holderName != "ABC", )

After ' "ABC",' , no member is displayed.

2. unexpected member appeared.

3. After binding variable, no completion for the bind variable

    when
    BusinessCard( count == 0 )
    $A :BusinessCardHolder( holderName != "ABC")
    $A.

after '$A.' , no member is displayed.