Embedded view navigation not working with keyboard - focus lost

The following weired behaviour appears on my Notes client and is reproducable on other clients:

I have an embedded view in a form. The form contains two fields (above the embedded view), that are used to calculate the view to be shown.

Now I click into the embedded view (so that I can tell the focus is there) and I use KEY UP or KEY DOWN from the keyboard. And all of a sudden - the focus is back on the field above the embedded view.

This happens with Notes Client 8.5.1. (Eclipse and Basic)

When using Client 6.5.1 - everything is fine.

Thanks in advance for any help