Steps to reproduce:
1) go to historic process instance view
2) select external tasks tab
3) go to last page
4) select an (external) task on the diagram

Problem:
The following message is shown inside the external tasks tab: No external tasks for this process instance

Expected Behavior:
The selected external task is shown in tab.

Hint:

• The same problem occurs also in other tabs.
• When filtering by the diagram the page is not reset to 1 (it remains on the last page)