Bug: Notebook Editor, Interactive Window, Editor cells

I can't get the sound button working on this widget: the sound button is grey/not clickable

%matplotlib inline
import matplotlib.pyplot as plt
import numpy as np
from ipywidgets import interactive
from IPython.display import Audio, display
def beat_freq(f1=220.0, f2=224.0):
    max_time = 3
    rate = 8000
    times = np.linspace(0,max_time,rate*max_time)
    signal = np.sin(2*np.pi*f1*times) + np.sin(2*np.pi*f2*times)
    print(f1, f2, abs(f1-f2))
    display(Audio(data=signal, rate=rate))
    try:
         plt.plot(signal); #plt.plot(v.result);
    except:
         pass
    return signal
v = interactive(beat_freq, f1=(200.0,300.0), f2=(200.0,300.0))
display(v)

Steps to cause the bug to occur

1. run this cell in a jupyter notebook

Actual behavior

sound button is grey / not clickable

Expected behavior

I can launch and hear the sound

Your Jupyter and/or Python environment

• Winpython, Jupyter-2.2, vscode-1.44.2

Please provide as much info as you readily know

• **Jupyter server running: Local
• **Extension version: 2020.4.74986
• **VS Code version: 1.44.2
• **Setting python.jediEnabled: (the default , don't know what it is)
• Python and/or Anaconda version: Python-3.8.2 (Winpython64-3.8.2.1b2.exe)
• OS: Windows | Mac | Linux (distro): Windows 10 1909
• **Virtual environment: nothing

remark: all the rest of this works, so it's not bad at all https://github.com/winpython/winpython_afterdoc/blob/master/docs/Winpython_checker.ipynb

Microsoft Data Science for VS Code Engineering Team: @rchiodo, @IanMatthewHuff, @DavidKutu, @DonJayamanne, @greazer