Keep axis range fixed while selecting / deselecting on html plot

Hi,

I have a go.Scatter plot showing data from satellites on a datetime xaxis. When selecting or deselecting a satellite, the two axis adjust their displayed range to the data shown. I want to keep both axis fixed to a predefined range: so overall start / end times for xaxis, and overall range of observable shown, these data are calculated. I tried with

        fig.update_xaxes(title='<b>Date-Time</b>',
                         ticks='outside',
                         fixedrange=True,
                         range=[idx_dt[0], idx_dt[-1]],
                         showgrid=True, gridwidth=1, gridcolor='gainsboro',
                         minor_ticks="outside", minor_showgrid=False)

where the idx_dt list contains the dataetimes of the observations. But the date-time xaxis adjust to the timespan of the satellites selected.

Any help appreciated
Tx/Alain