This sequence can not be displayed for Grundig TVs by Logitech technology. First level support was very helpful and very friendly, but unfortunately can not help you as soon as it went a little deeper.
The Seviceticket then remained despite promises longer unprocessed and after more than 14 days, it is still not working.
I do not like at the FB also that there are only 3 buttons for actions and I do not know well (z. B. in case of error), which is currently active. The 3 keys are indeed occupied two times with short and long press, but turns out in practice to be quite impractical.
The infrared transmission through the hub worked for me and that requires the remote no "visual contact" to the hub (Bluetooth connection) I was also practical.
Conclusion: not to be used with a Grundig TV.