### Elasticsearch Version

8.2.0

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

docker-image = docker.elastic.co/elasticsearch/elasticsearch:8.2.0

### Problem Description

We are trying to migrate from Elasticsearch 6.7.1 to Elasticsearch 8.2.0.

With the same amount of documents per bulk request (100 docs per request), we always get a socket timeout in Elasticsearch 8.2.0. Everything works fine in Elasticsearch 6.7.1.

I noticed that indexing the same document in Elasticsearch 8.2.0 takes 44152ms. In Elasticsearch 6.7.1, indexing takes 50ms.

### Steps to Reproduce

[elasticsearch_8.2.0.txt](https://github.com/elastic/elasticsearch/files/8754299/elasticsearch_8.2.0.txt)
[elasticsearch_6.7.1.txt](https://github.com/elastic/elasticsearch/files/8754300/elasticsearch_6.7.1.txt)



### Logs (if relevant)

_No response_
server/src/test/java/org/elasticsearch/index/mapper/CopyToMapperTests.java
}
                    b.endObject();
                }
                b.endObject();
            }
            b.endArray();
            b.startObject("properties");
            {
                b.startObject("copy_test");
                {
                    b.field("type", "text");
                    b.field("copy_to", "very.inner.field");
                }
                b.endObject();
            }
            b.endObject();
        }));
        MapperParsingException e = expectThrows(MapperParsingException.class, () -> docMapper.parse(source(b -> {
            b.field("copy_test", "foo");
            b.field("new_field", "bar");
        })));
        assertThat(e.getMessage(), startsWith("It is forbidden to create dynamic nested objects ([very]) through `copy_to`"));
    }
    private void assertFieldValue(LuceneDocument doc, String field, Number... expected) {
        IndexableField[] values = doc.getFields(field);
        if (values == null) {
            values = new IndexableField[0];
        }
        Number[] actual = new Number[values.length];
        for (int i = 0; i < values.length; ++i) {