Shapash Webapp displays incorrect plot when server process > 1

[ThomasBouche]

Shapash Webapp displays incorrect plot when server process > 1

In the case the webapp is exposed with processes > 1 in the uwsgi configuration, the app does not behave as expected.
For instance:

• the selection of a feature triggers the display of a subset
• maximizing the feature selector plot change the selected feature
• etc.

Python version : 3.9

Shapash version : tested on 2.2, may affect other versions

Operating System : Any

How to reproduce:

app = xpl.smartapp.app
app.run_server(debug=False, host="0.0.0.0", port=8080, processes=2, threaded=False)

[ThomasBouche]

The bugs you can see in the Gif below are not a normal behavior of the webapp:

• When you click on a feature of the plot feature importance, the gray bars (subset) are not supposed to appear
• When you select a subset and click on a grey bar, the contribution plot should display the subset
• When you zoom on the contribution plot, the plot is not supposed to change feature and subset