Pressing power button causes a blank figure

Pressing the power button (toggle interaction) causes the whole figure to become blank, instead of just disabling interaction. Difficult to reproduce this every time. Tried with both Firefox and Chrome, and in some cases (mostly Firefox), the button worked as intended. In some cases the plot line is still visible, but the axes and labels disappear.

Tested on jupyter lab. My versions are the following:

matplotlib                2.2.2                    py36_1    conda-forge
ipympl                    0.2.1                    py36_0    conda-forge
jupyter_client            5.2.3                      py_1    conda-forge
jupyter_core              4.4.0                      py_0    conda-forge
jupyterlab                0.32.1                   py36_0    conda-forge
jupyterlab_launcher       0.10.5                   py36_0    conda-forge
@jupyter-widgets/jupyterlab-manager
        @jupyter-widgets/jupyterlab-manager v0.35.0  enabled  OK
Firefox 61.0.1
Chrome 67.0.3396.99

Empieza reproduciendo el cambio de la power-button en JupyterLab usando las versiones de Firefox y Chrome indicadas; después, compara los casos en los que el gráfico queda en blanco con aquellos en los que funciona. Se considera terminado cuando desactivar la interacción deja visibles la línea del gráfico, los ejes y las etiquetas, en lugar de dejar la figura en blanco u ocultarla parcialmente.