matplotlib widgets fail to load

Describe the issue

Get a line like [<matplotlib.lines.Line2D at 0x7f610447e140>] when trying to plot, and an 'empty' plot which seems to have a toolbar of button, but no content.

developer tools console has:

Failed to fetch ipywidgets through the "jupyter.widget.control" comm channel, fallback to fetching individual model state. Reason: Control comm was closed too early
_loadFromKernel @ manager-base.js:291

Versions

 3.10.8 (main, Nov 30 2022, 11:24:29) [GCC 10.2.1 20210110]
ipympl version: 0.9.2
Selected Jupyter core packages...
IPython          : 8.7.0
ipykernel        : 6.18.3
ipywidgets       : 8.0.2
jupyter_client   : 7.4.7
jupyter_core     : 5.1.0
jupyter_server   : 1.23.3
jupyterlab       : 3.5.1
nbclient         : 0.7.2
nbconvert        : 7.2.5
nbformat         : 5.7.0
notebook         : 6.5.2
qtconsole        : not installed
traitlets        : 5.6.0
Known nbextensions:
  config dir: /home/zlobko/.pyenv/versions/3.10.8/etc/jupyter/nbconfig
    notebook section
      jupyter-matplotlib/extension  enabled
      - Validating: OK
      jupyter-js-widgets/extension  enabled
      - Validating: OK
JupyterLab v3.5.1
/home/zlobko/.pyenv/versions/3.10.8/share/jupyter/labextensions
        jupyterlab_pygments v0.2.2 enabled OK (python, jupyterlab_pygments)
        jupyter-matplotlib v0.11.2 enabled OK
        @jupyter-widgets/jupyterlab-manager v5.0.3 enabled OK (python, jupyterlab_widgets)

Other labextensions (built into JupyterLab)
   app dir: /home/zlobko/.pyenv/versions/3.10.8/share/jupyter/lab


The following source extensions are overshadowed by older prebuilt extensions:
    @jupyter-widgets/jupyterlab-manager

FWIW: This is on debian/WSL2 (which was converted from WSL1).

Reproduisez le graphique vide avec les versions indiquées de Python, ipympl, JupyterLab et ipywidgets, puis commencez par l’échec du chargement du widget dans manager-base.js:291 et par les extensions jupyter-matplotlib activées. C’est terminé lorsque le widget matplotlib se charge dans JupyterLab et que le contenu du graphique ainsi que la barre d’outils s’affichent sans l’erreur de canal de communication signalée.