[BUG] Duplicate callback outputs not working when deployed with `gunicorn`

[hannahker]

Describe your context

Bug only present when app is deployed via Dash Enterprise.

dash                          2.9.1
dash-ag-grid                  2.0.0a4
dash-core-components          2.0.0
dash-design-kit               1.6.8
dash-extensions               0.0.65
dash-html-components          2.0.0
dash-leaflet                  0.1.23
dash-mantine-components       0.12.0
dash-table                    5.0.0

Describe the bug

Callbacks with duplicate outputs don't work reliably when my app is deployed with gunicorn (ie. DE), giving errors like this:

KeyError: "Callback function not found for output '..image-options.rowData...geojson.data...satellite-img.children@e635ba05b4e74958834c65e29d0a3207...classified-img.children@b954a7e5a88643d29e99412073ede694...image-options.selectedRows...delete-notify.children..', perhaps you forgot to prepend the '@'?"

There is definitely the appropriate decorator on my function. The callbacks behave as expected when I run the app locally, both with Python and with gunicorn. About 10% of the time the callback will run fine.

Expected behavior

I'd expect this KeyError not to occur when the app is deployed.