title: Jupyter lab headings uncollapse when not intended (going over them)
body: <p>I have a problem with jupyter lab's headings. The thing is that the <code>collapsible headings</code> are uncollapsing whenever y navigate over them with the &quot;up&quot; and &quot;down arrow keys&quot;. I understand that these <code>collapsible headings</code> should uncollapse only when clicking &quot;right arrow&quot; (or by clicking with the mouse on the &quot;triangle&quot; icon next to the heading).</p>
  <p>I find this behavior annoying because I think that the whole point of having <code>collapsible headings</code> is to hide code to being able to navigate to relevant parts of the notebook quickly. However, this is complicated if the headings uncollapse when I try to go over them.</p>
  <p>The strange thing is that this problem doesn't happen all of the time. Sometimes I initialize my jupyter lab and everything works properly, and some other times this problem appears.</p>
  <p>I am using <code>virtualenv</code> to ensure I use the same jupyter lab version.</p>
  <p>Below is some information that might be relevant about the packages and extensions I'm using:</p>
  <ul>
  <li>Jupyter lab packages:</li>
  </ul>
  <pre><code>jupyter==1.0.0
  jupyter-client==6.1.7
  jupyter-console==6.2.0
  jupyter-contrib-core==0.3.3
  jupyter-contrib-nbextensions==0.5.1
  jupyter-core==4.7.0
  jupyter-highlight-selected-word==0.2.0
  jupyter-latex-envs==1.4.6
  jupyter-nbextensions-configurator==0.4.1
  jupyter-packaging==0.9.2
  jupyter-server==1.6.4
  jupyterlab==3.0.14
  jupyterlab-pygments==0.1.2
  jupyterlab-server==2.5.0
  jupyterlab-widgets==1.0.0
  </code></pre>
  <ul>
  <li>Jupyter lab extensions:</li>
  </ul>
  <pre><code>@jupyter-widgets/jupyterlab-manager
  @ijmbarr/jupyterlab_spellchecker
  @aquirdturtle/collapsible_headings
  jupyterlab-dash
  jupyterlab-plotly
  </code></pre>
  <p>I hope my question is clear.</p>
  <p>Thanks in advance :D</p>