[BUG] Incomplete results with search_after and multiple shards

Describe the bug

In some cases, a search request with "search_after" and "track_total_hits=false" does not return all expected documents, some documents are missing.

Related component

To Reproduce

Create an index with 10 shards (a different number of shards might not trigger the bug): PUT /test_index
```
{
"settings": {
    "index": {
        "number_of_shards": 10
    }
}
}
```

Index some documents (putting different _id might not trigger the bug): POST /_bulk


{ "index": { "_index": "test_index", "_id": "test_index-id-doc1" } }
{"docNb": "doc1","name": "bob"}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc2" } }
{"docNb": "doc2","name": ""}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc3" } }
{"docNb": "doc3"}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc4" } }
{"docNb": "doc4","name": "ana"}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc5" } }
{"docNb": "doc5","name": ""}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc6" } }
{"docNb": "doc6"}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc7" } }
{"docNb": "doc7"}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc8" } }
{"docNb": "doc8"}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc9" } }
{"docNb": "doc9","name": ""}
{ "index": { "_index": "test_index", "_id": "test_index-id-doc10" } }
{"docNb": "doc10","name": ""}

3. Search documents:
GET /test_index/_search

{ "size": 20, "track_total_hits": false, "sort": [ { "name.keyword": { "order": "desc" } }, { "docNb.keyword": { "order": "asc" } } ], "search_after": [ "ana", "doc4" ] }

4. The result contains 7 documents instead of 8. Execute the previous request with "track_total_hits": true and the results contains the correct number of documents.

### Expected behavior

A request with "search_after" and "track_total_hits:false" should return the correct number of documents. 

### Additional Details

**Host/Environment (please complete the following information):**
 - OS: Windows 10 with WSL2 and docker
 - Version : docker image: opensearchproject/opensearch:2.15.0
- 1 opensearch node run with the following docker compose file:

version: '3' services: opensearch: image: opensearchproject/opensearch:2.15.0 container_name: opensearch environment:

cluster.name=opensearch-cluster # Name the cluster
node.name=opensearch # Name the node that will run in this container
discovery.seed_hosts=opensearch # Nodes to look for when discovering the cluster
cluster.initial_cluster_manager_nodes=opensearch # Nodes eligibile to serve as cluster manager
bootstrap.memory_lock=true # Disable JVM heap memory swapping
"OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m" # Set min and max JVM heap sizes to at least 50% of system RAM
"DISABLE_INSTALL_DEMO_CONFIG=true" # Prevents execution of bundled demo script which installs demo certificates and security configurations to OpenSearch
"DISABLE_SECURITY_PLUGIN=true" # Disables Security plugin ulimits: memlock: soft: -1 # Set memlock to unlimited (no soft or hard limit) hard: -1 nofile: soft: 65536 # Maximum number of open files for the opensearch user - set to at least 65536 hard: 65536 volumes:
opensearch:/usr/share/opensearch/data # Creates volume called opensearch-data1 and mounts it to the container ports:
9200:9200 # REST API
9600:9600 # Performance Analyzer networks:
opensearch-net # All of the containers will join the same Docker bridge network

volumes: opensearch:

networks: opensearch-net:

opensearch-project / OpenSearch