Does anybody have some light to shed on this issue?
Driven by the idea that Logitech was going to shove this firmware update down my throat I installed PiHole and made it responsible for DNS and DHCP in my network. IP changed for the Harmony Hub. After the downgrade I was and still am unable to reconfigure/contact the Hub.
Any input is greatly appreciated, this was one of the best integrations of OpenHAB and KNX for me.