### 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/main/java/org/elasticsearch/index/mapper/DocumentParser.java
}
        innerParseObject(context, mapper);
        
        if (mapper.isNested()) {
            nested(context, (NestedObjectMapper) mapper);
        }
    }
    private static void throwOnConcreteValue(ObjectMapper mapper, String currentFieldName) {
        throw new MapperParsingException(
            "object mapping for ["
                + mapper.name()
                + "] tried to parse field ["
                + currentFieldName
                + "] as object, but found a concrete value"
        );
    }
    private static void innerParseObject(DocumentParserContext context, ObjectMapper mapper) throws IOException {
        XContentParser.Token token = context.parser().currentToken();
        String currentFieldName = context.parser().currentName();
        assert token == XContentParser.Token.FIELD_NAME || token == XContentParser.Token.END_OBJECT;
        while (token != XContentParser.Token.END_OBJECT) {
            if (token == null) {
                throwEOF(mapper, currentFieldName);
            }
            switch (token) {
                case FIELD_NAME:
                    currentFieldName = context.parser().currentName();
                    if (currentFieldName.isBlank()) {
                        throwFieldNameBlank(context, currentFieldName);
                    }