Notebook failed to load - InternalError: too much recursion

Hi there. I just got a very strange error with a notebook. Maybe it does not need to be addressed, but I thought I'd rather at least document the issue...

So I have a notebook (12MB) that I can't load anymore over a distant connection to jupyter notebook 6.0.3:

The message says:
> Notebook failed to load
> The error was
> InternalError: too much recursion
> See the error console for details

What is strange is that
- in the background the notebook is partially loaded (it is truncated, in fact)
- there is no error in the server console
- and I can open the notebook with no error, with the same server, if I use another machine that has a better connection to the server.

Also, the truncation occurs on this cell
```
import plotly.graph_objs as go
import plotly.offline as offline

offline.init_notebook_mode()
```
which has one invisible output: the plotly.js library (>2MB).

And, finally, the problem does not occur at all if I remove the output for that cell. Any idea?

Reproduce the load failure with Jupyter Notebook 6.0.3 over a distant connection using a notebook containing the Plotly output described in the issue. Compare browser error-console details and loading behavior with the large output present versus removed; done means the notebook loads without the recursion error or the failure is clearly characterized.

Written by the indexing model from the issue text.