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DashExtensions - MultiplexTransforms does not work with client-side callbacks

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dash==1.19.0
dash_core_components
dash_html_components
dash_bootstrap_components
dash-extensions==0.0.51
plotly==4.14.1
pandas==1.1.5
numpy===1.19.3
ipywidgets==7.5.1
statsmodels==0.12.1
scikit-learn==0.23.2
matplotlib==3.3.3
scipy==1.5.4
mariadb==1.0.5
gunicorn==20.0.4

Letting you know that MultiplexTransforms only works if all callbacks/defs that point to the same Output are server-side code. If one of the callbacks is a clientside-callback, you get the Duplicate callback outputs error message and the page won’t load.

The project I am working on is quite large/unwieldy, and I am under a tight deadline, so cannot take time away to create a demo. Apologies. But I duplicated the client-side callback with a server-side callback that does the same thing, and was able to comment-out one or the other and produce/remove the error on demand. No doubt about it.

PS - Would it make sense to create either a category or a tag for the Dash Extensions?

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