### Elasticsearch Version

8.6.0

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

docker-image = docker.elastic.co/elasticsearch/elasticsearch:8.6

### Problem Description

We are trying to migrate from Elasticsearch 6.7.1 to Elasticsearch 8.6.0.

With the same document we always get IndexOutOfBoundsException while trying to fetch innerhits in Elasticsearch 8.6.0. Everything works fine in Elasticsearch 6.7.1.


### Steps to Reproduce

[elasticsearch_6.7.1 (1).txt](https://github.com/elastic/elasticsearch/files/10466823/elasticsearch_6.7.1.1.txt)
[elasticsearch_8.6.0.txt](https://github.com/elastic/elasticsearch/files/10466824/elasticsearch_8.6.0.txt)


### Logs (if relevant)

`{"@timestamp":"2023-01-20T13:39:21.170Z", "log.level": "WARN", "message":"path: /test/_search, params: {index=test}", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[es01][search][T#10]","log.logger":"rest.suppressed","elasticsearch.cluster.uuid":"T3_Kb_fZTOORKN7Bn5jz2g","elasticsearch.node.id":"fESFHfZ-RxuDaPIIKhOoNA","elasticsearch.node.name":"es01","elasticsearch.cluster.name":"es_alex","error.type":"org.elasticsearch.action.search.SearchPhaseExecutionException","error.message":"all shards failed","error.stack_trace":"Failed to execute phase [query], all shards failed; shardFailures {[fESFHfZ-RxuDaPIIKhOoNA][test][0]: org.elasticsearch.transport.RemoteTransportException: [es01][172.27.0.2:9300][indices:data/read/search[phase/query]]\nCaused by: org.elasticsearch.search.fetch.FetchPhaseExecutionException: Fetch Failed [Error running fetch phase for doc [73]]\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.buildSearchHits(FetchPhase.java:181)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.execute(FetchPhase.java:93)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.SearchService.executeFetchPhase(SearchService.java:659)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:634)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.SearchService.lambda$executeQueryPhase$2(SearchService.java:489)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionRunnable.lambda$supply$0(ActionRunnable.java:47)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionRunnable$2.doRun(ActionRunnable.java:62)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.TimedRunnable.doRun(TimedRunnable.java:33)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:769)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)\n\tat java.base/java.lang.Thread.run(Thread.java:833)\nCaused by: org.elasticsearch.search.fetch.FetchPhaseExecutionException: Fetch Failed [Error running fetch phase for doc [43]]\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.buildSearchHits(FetchPhase.java:181)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.execute(FetchPhase.java:93)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.subphase.InnerHitsPhase.hitExecute(InnerHitsPhase.java:76)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.subphase.InnerHitsPhase$1.process(InnerHitsPhase.java:52)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.buildSearchHits(FetchPhase.java:177)\n\t... 13 more\nCaused by: java.lang.IndexOutOfBoundsException: Index: 43, Size: 1\n\tat java.base/java.util.Collections$SingletonList.get(Collections.java:4959)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.prepareNestedHitContext(FetchPhase.java:466)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.prepareHitContext(FetchPhase.java:312)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.buildSearchHits(FetchPhase.java:165)\n\t... 17 more\n}\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.AbstractSearchAsyncAction.onPhaseFailure(AbstractSearchAsyncAction.java:728)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.AbstractSearchAsyncAction.executeNextPhase(AbstractSearchAsyncAction.java:418)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.AbstractSearchAsyncAction.onPhaseDone(AbstractSearchAsyncAction.java:760)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.AbstractSearchAsyncAction.onShardFailure(AbstractSearchAsyncAction.java:512)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.AbstractSearchAsyncAction$1.onFailure(AbstractSearchAsyncAction.java:349)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionListener$Delegating.onFailure(ActionListener.java:92)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionListenerResponseHandler.handleException(ActionListenerResponseHandler.java:48)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.SearchTransportService$ConnectionCountingHandler.handleException(SearchTransportService.java:642)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.transport.TransportService$UnregisterChildTransportResponseHandler.handleException(TransportService.java:1650)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.transport.TransportService$ContextRestoreResponseHandler.handleException(TransportService.java:1390)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.transport.TransportService$DirectResponseChannel.processException(TransportService.java:1512)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.transport.TransportService$DirectResponseChannel.sendResponse(TransportService.java:1487)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.transport.TaskTransportChannel.sendResponse(TaskTransportChannel.java:50)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.support.ChannelActionListener.onFailure(ChannelActionListener.java:48)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionRunnable.onFailure(ActionRunnable.java:77)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:28)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.TimedRunnable.doRun(TimedRunnable.java:33)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:769)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)\n\tat java.base/java.lang.Thread.run(Thread.java:833)\nCaused by: org.elasticsearch.ElasticsearchException$1: Index: 43, Size: 1\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.ElasticsearchException.guessRootCauses(ElasticsearchException.java:638)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.search.AbstractSearchAsyncAction.executeNextPhase(AbstractSearchAsyncAction.java:416)\n\t... 20 more\nCaused by: java.lang.IndexOutOfBoundsException: Index: 43, Size: 1\n\tat java.base/java.util.Collections$SingletonList.get(Collections.java:4959)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.prepareNestedHitContext(FetchPhase.java:466)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.prepareHitContext(FetchPhase.java:312)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.buildSearchHits(FetchPhase.java:165)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.execute(FetchPhase.java:93)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.subphase.InnerHitsPhase.hitExecute(InnerHitsPhase.java:76)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.subphase.InnerHitsPhase$1.process(InnerHitsPhase.java:52)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.buildSearchHits(FetchPhase.java:177)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.fetch.FetchPhase.execute(FetchPhase.java:93)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.SearchService.executeFetchPhase(SearchService.java:659)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.SearchService.executeQueryPhase(SearchService.java:634)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.search.SearchService.lambda$executeQueryPhase$2(SearchService.java:489)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionRunnable.lambda$supply$0(ActionRunnable.java:47)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.action.ActionRunnable$2.doRun(ActionRunnable.java:62)\n\tat org.elasticsearch.server@8.4.3/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)\n\t... 6 more\n"}`
server/src/main/java/org/elasticsearch/index/mapper/DocumentParserContext.java
protected abstract void addDoc(LuceneDocument doc);
    /**
     * Find a dynamic mapping template for the given field and its matching type
     *
     * @param fieldName the name of the field
     * @param matchType the expecting matchType of the field
     * @return the matching template; otherwise returns null
     * @throws MapperParsingException if the given field has a dynamic template name specified, but no template matches that name.
     */
    public final DynamicTemplate findDynamicTemplate(String fieldName, DynamicTemplate.XContentFieldType matchType) {
        final String pathAsString = path().pathAsText(fieldName);
        final String matchTemplateName = sourceToParse().dynamicTemplates().get(pathAsString);
        for (DynamicTemplate template : root().dynamicTemplates()) {
            if (template.match(matchTemplateName, pathAsString, fieldName, matchType)) {
                return template;
            }
        }
        if (matchTemplateName != null) {
            throw new MapperParsingException(
                "Can't find dynamic template for dynamic template name [" + matchTemplateName + "] of field [" + pathAsString + "]"
            );
        }
        return null;
    }
    
    
    private static class CopyToParser extends FilterXContentParserWrapper {
        enum State {
            FIELD,
            VALUE