I recently started migrating Workflows from 2010 to 2013. I added the "Workflows I've started" and "My Workflow Tasks" Web Parts to a page. The "Workflows I've started" Web Part works fine but the "My Workflow Tasks" Web Part is just empty although there are existing tasks for me.
In the Workflow settings I renamed the standard task list name from "Workflow Tasks" into "Workflow Tasks Leave Request". Does this make any difference?