I have set up a SharePoint 2013 as a single Server. I created a single web application with three site collections. In each site collection I created a subsite based on the project site template. After that I added some tasks to the task list at the root site of each site collection and to the task lists at the sub sites. All tasks are assigned to the current user. The user is site collection admin at all site collections. The search returns results for all these task lists. The Work Management service has full control privileges on the web application. Uls is not giving any error, Health analyzer neither.
But if I look at my tasks I can only see the tasks from site collection one and two and all it's subsites but not from site collection three.
Why aren't the tasks from the third site collection showing up?
