If I create a separate filter for the domain and the group by, they work fine. But I want the user to be able to select both of them from the same click.

I am trying to create the following filter

<filter name="En Route"
        domain="[('delivery_state', '=', 'en_route')]"
        context="{'group_by': 'vehicle_id'}"/>

When I do this, Odoo ignores the domain and only creates a group by filter.