**Describe the bug** When connecting an external cursor with the tooltip visibility disabled, the legend extra values do not show. Related to https://github.com/elastic/elastic-charts/pull/817 **Expected behavior** The legend values updated based on external cursor events. **Screenshots**  Notice the static legend extra values in the dependent chart. **Kibana Cross Issues** https://github.com/elastic/kibana/issues/89306 **Checklist** - [x] every related Kibana issue is listed under `Kibana Cross Issues` list - [x] `kibana cross issue` tag is associated to the issue if any kibana cross issue is present
Describe the bug
When connecting an external cursor with the tooltip visibility disabled, the legend extra values do not show.
Related to #817
Expected behavior
The legend values updated based on external cursor events.
Screenshots
Notice the static legend extra values in the dependent chart.
Kibana Cross Issues
elastic/kibana#89306
Checklist
Kibana Cross Issueslistkibana cross issuetag is associated to the issue if any kibana cross issue is present