VSCode with python extension - can't expand objects in Watch and Debug Console

[zaino]

I can't inspect objects in the Watch window nor in the Debug Console:

Environment data

• VS Code version: 1.32.3
• Extension version (available under the Extensions sidebar): 2019.3.6215 (28 March 2019)
• OS and version: Windows 10 - OS Build 17134.523
• Python version (& distribution if applicable, e.g. Anaconda): Anaconda, Python 3.7.3
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda
• Relevant/affected Python packages and their versions: everything?

Expected behaviour

Objects should be inspectable in Watch Windows (expansion arrow)

Actual behaviour

Don't have an expansion arrow in Watch and Debug Console

Steps to reproduce:

1. Debug any code with instance of any class
2. Put the instance name in the Watch Window
3. The object does not show the expansion arrow, so I can't inspect it
4. Same behavior when hovering and when using Debug Console, the same object is expandable in the "VARIABLES->Locals" window

Logs

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

Nothing

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help; turn on source maps to make any tracebacks be useful by running Enable source map support for extension debugging)

[DonJayamanne]

Duplicate of #5035