Swift debugging in Xcode - I can't look in to my dictionary contents

If I put a simple dictionary such as this in a new Xcode project:

var myDictionary:[String: String] = [
            "a": "line 1",
            "b": "line 2"]

I would expect to be able to look browse the contents of the dictionary when I'm debugging in Xcode. However all Xcode tells me is:

myDictionary [String : String] 0 key/value pairs

For Arrays and object you normally have the foldable tree structure to look in to the contents. The closest I can see to this right now in Xcode for a dictionary is a "Print Description" option when I right click that spits the entire contents of the dictionary in the console but this isn't exactly what I need

I'm not certain if this was happening before I switched to Xcode 8 or not. I had only been using swift for a short while before switching to Xcode 8. I think it is likely that it wasn't happening before the switch because it's likely i would have noticed it then

Is there any settings I can change so that I can see the contents of this dictionary in my debugger?