Hi Florian,
thanks for your answer.
I am using the sap.ui.table.Table. So I should see that the table is firing requests in the network tracking of the browser, right (F12 -> Network)?
I have to check tomorrow and will respond here again. Maybe you can help me with another question I got: The header of my Table is plain white, looks just like another row in the table. All the examples I went through had a grey header, which was a lot better in terms of useability.. Any idea how to change that?