pyviz-comms with ipywidgets

[djangoliv]

After installing pyviz-comms, ipywidgets no longer works after a restart.

To reproduce:

> pip install jupyterlab ipywidgets pyviz-comms
> jupyter lab

create a simple cell with ipywidgets like

import ipywidgets
ipywdgets.Button()

1. execute => Ok
2. save and close the file
3. reopen the file
4. execute => KO: model not found

Without the installation of pyviz-comms, we can re-execute the notebook without problem.

jupyterlab: 4.2.3
ipywidgets: 8.1.3
pyviz_comms: 3.0.2

os: debian bookworm

Regards