Type mismatch when doing OR on collect statements for collect pattern

rule "Rule that breaks ExecutableModel"
@filename("rules.drl")
ruleflow-group "RFG-1"
salience 5
no-loop true
when
        $list: List()
        $cwvs:    (
            List(size > 0) from collect ( ClassWithValue(value == null) ) or
            List(size > 0) from collect ( ClassWithValue(value != null) )
        )
    then
        $list.addAll($cwvs);
end