Can't pane switch with python interactive

Describe the bug

When I'm using VSCode's data science tools,
And I try to switch away from the python interactive pane,
the pane doesn't switch,
and I get TaskQueue: Error running task. Cannot read property 'options' of undefined from the Vim extension.

This also occurs when I used the default ctrl+w ctrl+w to pane switch.

To Reproduce
Steps to reproduce the behavior:

1. (likely not necessary to reproduce, but how it's set up for me) In keybindings.json:

    {
        "key": "alt+h",
        "command": "workbench.action.focusLeftGroup"
    },

2. Now, in the code, make a cell:

#%%
print("Hello World")

3. Run the cell.
4. Try to switch panes from the interactive window back to the code.

Expected behavior
The pane switches properly.

Environment (please complete the following information):

• Extension (VsCodeVim) version: 1.8.0
• VSCode version: Version 1.34.20-insider
• OS: Mac OS Mojave

Additional context
I don't think this is specific to when the keybindings are switched.

Start by reproducing the issue with VSCode's Python interactive window and a cell marked with #%%, using the reported pane-switching keybindings. Then trace the TaskQueue error mentioning an undefined options property. Done means switching from the interactive pane back to the code works without the Vim extension error; the payload names no repository file or test.