Nested: SearchParseException when query to non-existing type

Elastic Stack Elasticsearch
1

I create an index with multiple types all of which has a nested field defined as follows:

"AssocQueries": {
    "type": "nested",
    "properties": {
        "Term": {
            "type": "string",
            "fields": {
                "exact": {
                    "type": "string",  "analyzer": "lowercase_keyword"
                }
            }
        },
        "Count": {
            "type": "long"
        }
    }
},

And in queries to all type, there is a nested query with function score as follows:
{
"nested": {
"path": "AssocQueries",
"query": {
"function_score": {
"query": {
"match": {
"exact": "blah blah..."
}
},
functions: [{
}],
}
}
}
}

The problem is, if I send the query to a non-existing type, example, localhost:9200/myindex/badtype/_search, I will get exception:
[nested] failed to find nested object under path [AssocQueries]]

I know I can check if the type is valid before run the query, but is there any other simple ways to avoid such exception even send query to an invalid type?

2

Any suggestion?
Somehow, I think it is ES's bug, since it should simply return empty result if the type does not exist. Actually, ES has different behavior for non-existing type query. If I remove the function score part from the query, the request won't throw exception for non-existing type.