When using a combobox (a lookup of another table) we run into some strange things when using the Universal GUI.

We have linked a field to a table via a look up.
When opening the relevant task screen, the value is shown correctly.
When we open the look up the value is not selected in the list of (look up-)values. If we select a value, put the focus on another field and then open the relevant lookup again, the value is selected.

In addition, the selected value is not displayed when the lookup is opened. Depending on the position in the list, the user has to scroll before the value appears.

Both points work normally (as expected in the Windows GUI).
Are these bugs in the Universal GUI, is this not supported yet in Universal GUI or do we have to set up something extra to use the Universal GUI for the use of combo boxes?