UITableView didSelectRowAt is not called iOS 10 but works for 9.3.5

There are many questions regarding this issue, but the answers I have found so far are not applicable. In this case, the table works correctly in iOS 9.3.5, but not for iOS 10 (or 10.3.1)

I excluded:

• Wrong delegate setup. Delegate 3 functions, didSelectRowAt
  
  , heightForRowAt
  
  and editActionsForRowAt
  
  . The latter is right-to-left scrolling, which allows for the same functionality as row selection. These three functions work correctly on v9.3.5 (as tested with a simulator and an older iPad I am testing with). When I use v10 with a simulator or my iPhone SE, heightForRowAt
  
  and editActionsForRowAt
  
  but not didSelectRowAt
  
  (and for that matter - I tried willSelectRowAt
  
  . It also didn't work for v10.)
• Any typographical error (as it works for 9.3.5)

I haven't been able to find anything about Swift changeover relative tableView(:didSelectRowAt)

to iOS 9 to iOS 10.

Background

I have a view controller with an appropriate xib ("DetailVC"). This xib has a label and then a table below the label. The table cell is another xib.

The view controller is exposed via

let uomVC = DetailVC()
self.navigationController?.pushViewController(uomVC, animated: true)

      

        
        
        
      

    

Then in DetailVC I use NSFetchedDataController and connect it to tableview via DataView Data Source delegate. (The master data is loaded and displayed perfectly.)

Code (I will send additional code as needed / requested - Swift 3)

viewDidLoad () - partial

let nib: String = "DetailCell"
let reuseID: String = "detailCell"
tableView.register(UINib.init(nibName: nib, bundle: nil), forCellReuseIdentifier: reuseID)

      

        
        
        
      

    

Tableview (: cellForRowAt)

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: reuseID) as! IngredientDetailCell
    cell.present(ingredient: _fetchedResultsController.object(at: indexPath))
    cell.isUserInteractionEnabled = true // Added later as a guess per SO suggestions
    return cell
}

      

        
        
        
      

    

For arguments - this won't print

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {      
    print("Selected a row")
    // delegate?.selectedIngredient(_fetchedResultsController.object(at: indexPath))
    // self.navigationController?.popViewController(animated: true)
}

      

        
        
        
      

    

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