Hi, I assume you are using different data sources on the map (using ds 1) and the list widget (using ds 2), so when you select a record on the map widget, records on ds 2 are not automatically selected, so the selected features view for ds 2 is empty.
If you still want to use the view of the selected features, you can add a Select data records action instead of the previous Filter data records action, to have the records on ds2 automatically selected.
To avoid brackets on the list widget when no feature is selected, check the option "View for empty selection" from the Data panel.
However, if you want to use the Filter data records action, you can change both the action data and the data used on the list widget to the default view. Please make sure you re-add dynamic content on the list text widgets after changing the list data view.
Shengdi