STEPS TO REPRODUCE:
1. Login as Admin
2. Navigate to Home->Resource Planning
3. Create new Tab called Tasks and add portlet "Team Member Task Summary"
4. Navigate to newly created tab and now attempt to click on any Task which should take you to Task properties page.
5. Now click on Return button and it takes you back to portlet but it will now only show tasks belonging to the project which you viewed Task properties for.
Expected Results: It should show same data as you first navigate to tab to see the data in the portlet for All projects.
Actual Results: It is only show tasks belonging to the project which you viewed Task properties for.
Workaround: You can click away from that tab and click on the tab again.