### 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
if (lastDotNdx == -1) {
                
                break;
            }
            String parentName = parentMapper.name().substring(0, lastDotNdx);
            parentMapper = context.mappingLookup().objectMappers().get(parentName);
            if (parentMapper == null) {
                
                parentMapper = context.getDynamicObjectMapper(parentName);
                if (parentMapper == null) {
                    
                    break;
                }
            }
            dynamic = parentMapper.dynamic();
        }
        if (dynamic == null) {
            return context.root().dynamic() == null ? ObjectMapper.Dynamic.TRUE : context.root().dynamic();
        }
        return dynamic;
    }
    
    
    
    
    private static Mapper getMapper(final DocumentParserContext context, ObjectMapper objectMapper, String fieldName) {
        if (context.path().atRoot()) {
            
            Mapper mapper = context.getMetadataMapper(fieldName);
            if (mapper != null) {