[BUG] Unable to cast object of type 'Elastic.Apm.Model.NoopSpan' to type 'Elastic.Apm.Model.Span'

[molszews]

APM Agent version

1.23.0

Environment

net6.0

Describe the bug

Error messages are logged when apm is disabled.

To Reproduce

Start app with UseAllElasticApm() and "Enabled" setting set to false in appsettings.json

  "ElasticApm": {
    "Enabled": false
}

after while error messages starts to log

[14:10:53 ERR] {AuditDiagnosticsListener} An exception occured calling OnNext on an ElasticsearchDiagnostic observer
System.InvalidCastException: Unable to cast object of type 'Elastic.Apm.Model.NoopSpan' to type 'Elastic.Apm.Model.Span'.
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.TryStartElasticsearchSpan(String name, Span& span, Uri instanceUri)
   at Elastic.Apm.Elasticsearch.AuditDiagnosticsListener.OnAudit(String event, Audit audit)
   at Elastic.Apm.Elasticsearch.AuditDiagnosticsListener.<.ctor>b__0_0(KeyValuePair`2 a)
   at Elasticsearch.Net.Diagnostics.TypedDiagnosticObserverBase`1.System.IObserver<System.Collections.Generic.KeyValuePair<System.String,System.Object>>.OnNext(KeyValuePair`2 value)
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.HandleOnNext(KeyValuePair`2 kv)
[14:10:53 ERR] {AuditDiagnosticsListener} An exception occured calling OnNext on an ElasticsearchDiagnostic observer
System.InvalidCastException: Unable to cast object of type 'Elastic.Apm.Model.NoopSpan' to type 'Elastic.Apm.Model.Span'.
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.TryStartElasticsearchSpan(String name, Span& span, Uri instanceUri)
   at Elastic.Apm.Elasticsearch.AuditDiagnosticsListener.OnAudit(String event, Audit audit)
   at Elastic.Apm.Elasticsearch.AuditDiagnosticsListener.<.ctor>b__0_0(KeyValuePair`2 a)
   at Elasticsearch.Net.Diagnostics.TypedDiagnosticObserverBase`1.System.IObserver<System.Collections.Generic.KeyValuePair<System.String,System.Object>>.OnNext(KeyValuePair`2 value)
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.HandleOnNext(KeyValuePair`2 kv)
[14:10:53 ERR] {HttpConnectionDiagnosticsListener} An exception occured calling OnNext on an ElasticsearchDiagnostic observer
System.InvalidCastException: Unable to cast object of type 'Elastic.Apm.Model.NoopSpan' to type 'Elastic.Apm.Model.Span'.
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.TryStartElasticsearchSpan(String name, Span& span, Uri instanceUri)
   at Elastic.Apm.Elasticsearch.HttpConnectionDiagnosticsListener.OnRequestData(String event, RequestData requestData)
   at Elastic.Apm.Elasticsearch.HttpConnectionDiagnosticsListener.<.ctor>b__0_0(KeyValuePair`2 a)
   at Elasticsearch.Net.Diagnostics.TypedDiagnosticObserverBase`2.System.IObserver<System.Collections.Generic.KeyValuePair<System.String,System.Object>>.OnNext(KeyValuePair`2 value)
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.HandleOnNext(KeyValuePair`2 kv)
[14:10:53 ERR] {HttpConnectionDiagnosticsListener} Failed to find current span in ConcurrentDictionary 00-372ff7fc0a235ce546f5c9a0e39ec8e9-91b96ddd006263d9-00
[14:10:53 ERR] {HttpConnectionDiagnosticsListener} An exception occured calling OnNext on an ElasticsearchDiagnostic observer
System.InvalidCastException: Unable to cast object of type 'Elastic.Apm.Model.NoopSpan' to type 'Elastic.Apm.Model.Span'.
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.TryStartElasticsearchSpan(String name, Span& span, Uri instanceUri)
   at Elastic.Apm.Elasticsearch.HttpConnectionDiagnosticsListener.OnRequestData(String event, RequestData requestData)
   at Elastic.Apm.Elasticsearch.HttpConnectionDiagnosticsListener.<.ctor>b__0_0(KeyValuePair`2 a)
   at Elasticsearch.Net.Diagnostics.TypedDiagnosticObserverBase`2.System.IObserver<System.Collections.Generic.KeyValuePair<System.String,System.Object>>.OnNext(KeyValuePair`2 value)
   at Elastic.Apm.Elasticsearch.ElasticsearchDiagnosticsListenerBase.HandleOnNext(KeyValuePair`2 kv)

Expected behavior

No errors re casting NoopSpan to Span are logged.
No errors re Failed to find current span in ConcurrentDictionary 00-372ff7fc0a235ce546f5c9a0e39ec8e9-91b96ddd006263d9-00 are logged.