CosmosDb Delete in Loop fails after one deletion - azure

Question

I have created a console app to delete documents from CosmosDB based on a partition that we have set up.
using (var client = new DocumentClient(new Uri(Config["CosmosEndpoint"]), Config["CosmosAuthkey"]))
{
var db = Options.Env.ToUpper().Equals("CI") ? Config["CiDatabase"] : Config["QaDatabase"];
var tenantString = $"{Options.Tenant}-{Options.Language}";
Log.Information($"Deleting {tenantString} from {db}-{Config["CosmosCollection"]}");
var query = client.CreateDocumentQuery<Document>(
UriFactory.CreateDocumentCollectionUri(db, Config["CosmosCollection"]),
"SELECT * FROM c",
new FeedOptions()
{
PartitionKey = new PartitionKey(tenantString)
}
).ToList();
Log.Information($"Found {query.Count} records for Tenant: {tenantString}");
if (query.Count > 0)
{
foreach (var doc in query)
{
Log.Information($"Deleting document {doc.Id}");
await client.DeleteDocumentAsync(doc.SelfLink,
new RequestOptions { PartitionKey = new PartitionKey(tenantString) });
Log.Information($"Deleted document {doc.Id}");
}
}
else
{
Log.Information($"Tenant: {tenantString}, No Search Records Found");
}
}
This never reaches the line Log.Information($"Deleted document {doc.Id}"); but also does not seem to throw an exception. I have wrapped the call in a try/catch for DocumentClient/ArgumentNull Exception in an attempt to see what it was but it just bombs on the delete call. It does, however, always delete one document.
This tells me that my config must be correct as I am connecting and querying and even deleting but not for all documents in the query. Even more strange is that I have copied this from another application that I wrote earlier where this code works.
Is there an upper limit on connecting meaning I need to delay my loop
some?
Why do I not see an exception when using a try/catch?
Or is there another reason that I only seem to be able to delete one document at a time with this code?