vscode-python: Debugger not working properly.

Environment data

• VS Code version: 1.27.0 and 1.28.0
• Extension version (available under the Extensions sidebar): 2018.9.0
• OS and version: Debian x86-64 Linux Kernal: 4.17.0
• Python version (& distribution if applicable, e.g. Anaconda): 2.73
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): N/A
• Relevant/affected Python packages and their versions: None

Actual behavior

Breakpoint pauses execution, but provides no debugger functionality

Expected behavior

I’m expecting the debugger to stop at the breakpoint and present me with the various variables and call stack.

Steps to reproduce:

1. Previous VS code uninstalled, ~/.config/Code deleted, ~/.vscode deleted. Clean VS Code installed, python extension installed.
2. Construct a very simple Hello.py: msg = “Hello” print(msg)
3. Place breakpoint on print line.
4. Start debugger. 4a. For vscode 1.27.0, the debugger toolbar comes up with Continue, Step Over, Step Into, Step Out, Restart, and Stop all enabled - breakpoint appears to be hit and Call Stack says “Paused on breakpoint”, but no variables or call stack information presented. If I click on Continue, Step Over, Step Into, Step Out then ‘Hello’ is printed and the program finishes it’s run (this is true even if I place the break point on the msg definition line). 4b. For vscode 1.28.0, the debugger toolbar comes up with Pause, Restart, and Stop enabled - breakpoint appears to be hit but none of the other buttons are enabled. Call Stack says “Paused on breakpoint”, but no variables or call stack information presented. Unable to do anything meaningful at this point other than Stop - Pause does nothing.
   4c. If the breakpoint was not set then ‘Hello’ is printed out in the terminal, the process finishes, and the prompt shows.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

##########Linting Output - pylint##########

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Your code has been rated at 10.00/10 (previous run: 10.00/10, +0.00)

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help) INFO no standard startup: not a new window