Swift 3 tableview.reloadData on main thread, not displaying cells properly - multithreading

Question

In a simple TableViewController i am calling ClouKit deleteRecord in a UIAlertController.
// 2. When the user clicks OK.
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { [weak alert] (_) in
LSCloudKit.shared.deleteRecord(record: login.toCKRecord(), completion: { (success) in
let index = self.logins.index(of: login);
self.logins.remove(at: index!);
self.tableView.reloadData(); // <-problem is here. Data not displayed properly
});
}));
When i call self.tableView.reloadData(), the table seems to update but it display the wrong list, ie: twice the same cell, sometimes its the one that got deleted and sometimes its another one.
I checked that the call is being made on the main thread.
Here is the deleteRecord function too:
func deleteRecord(record: CKRecord!, completion: #escaping (Bool) -> ()) {
let container = CKContainer.default();
let privateDatabase = container.privateCloudDatabase;
privateDatabase.delete(withRecordID: record.recordID) { (recordID, error) in
DispatchQueue.main.async {
completion(error == nil)
}
}
}
If i put a breakpoint in xCode anywhere either inside DispatchQueue.main.async or inside the completion block of "deleteRecord", then everything appears fine on the device once i hit "continue".
The problem happens on simulator and real devices as well.
Please help.
Thank you.
EDIT: Adding screenshot
Here is the screenshot before and after deleting "user1" from the list, with the output:
self.logins before delete: [admin, master, user1, user2, user3]
self.logins after delete: [admin, master, user2, user3]
Before delete
After delete

Answer 1

I was able to work around the problem by using this instead of reloadData()
self.tableView.beginUpdates()
self.tableView.deleteRows(at: [IndexPath.init(row: index!, section: 0)], with: .automatic)
self.tableView.endUpdates()
I will not mark this as the right answer for a while since it is a work around and i still dont understand why reloadData() did not work. Its annoying me.