Callback Ignoring Input and getting TypeError: missing 1 required positional argument: error

I am following the example on https://dash.plotly.com/sharing-data-between-callbacks and have a hidden div in my layout as:

html.Div(sid, id='session_id', style={'display': 'none'}),

with sid as a randomly defined string.

I have one callback that is working great:

@app.callback(
    [Output('graph-gains', 'children'),
     Output('table-gains', 'children'),
     Output('dps-gains', 'max_date_allowed'),
     Output('dps-gains', 'initial_visible_month'),
     Output('interval-gains', 'interval'),
     Output('msg_dbg-gains', 'children')],
    # sym, ix, date come straight from the control elements
    [Input('dd_sym-gains', 'value'),
     Input('dd_ix-gains', 'value'),
     Input('dps-gains', 'date'),
     Input('tabs-gains', 'active_tab'),
     Input('session_id', 'children'),
     Input('interval-gains', 'n_intervals')])
def callback_main_gains(sym, ix, date, period, sid, nint):

sid is passed as the fifth argument to my function and works correctly. However I am trying to add it into a second callback:

@app.callback(
    [Output('msg-feedback', 'children'),
     Output('textarea-feedback', 'value')],
    [Input('button_submit-feedback', 'n_clicks')],
    [State('textarea-feedback', 'value'),
     State('ddm-feedback', 'label')]
)
def callback_main_feedback(n_clicks, feedback, ddm):

also works without session-id, but adding it in and adding a sid argument as follows:

@app.callback(
    [Output('msg-feedback', 'children'),
     Output('textarea-feedback', 'value')],
    [Input('button_submit-feedback', 'n_clicks'),
     Input('session_id', 'children')],
    [State('textarea-feedback', 'value'),
     State('ddm-feedback', 'label')]
)
def callback_main_feedback(n_clicks, sid, feedback, ddm):
    return self.callback_main_feedback(n_clicks, sid, feedback, ddm)

gives me the following error when I click the page:

TypeError: callback_main_feedback() missing 1 required positional argument: 'ddm'

When I remove the sid argument, but not the Input(‘session_id’, ‘children’) Input:

@app.callback(
    [Output('msg-feedback', 'children'),
     Output('textarea-feedback', 'value')],
    [Input('button_submit-feedback', 'n_clicks'),
     Input('session_id', 'children')],
    [State('textarea-feedback', 'value'),
     State('ddm-feedback', 'label')]
)
def callback_main_feedback(n_clicks, feedback, ddm):
    return self.callback_main_feedback(n_clicks, feedback, ddm)

It doesn’t error but behaves as if Input(‘session_id’, ‘children’)] simply isn’t there.

I have tried this in two other callbacks. One that is a mirror-image of the working example is also is working correctly. Adding it into a fourth one is not working in the manner I’ve just described,

Any ideas what I am doing wrong here?

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