Die Oberklasse

Sometimes the apps do not work/illiuminate after switching the set on. You have to restart the TV to get them to work. This has happened on two occasions on both my Art and Connect TV's in the last couple of days; will get a log no when it next occurs

Noch nie gehört.

1. warten bis der TV tatsächlich eine Onlineverbindung hat.
2. schauen wie die IP Adressenverwaltung des Routers ausschaut, nicht daß der TV eine bereits vergebene Adresse nutzen will.

I am sure you are on the right lines and its not an issue with the TV. Probably accounts for the intermittent mobile recording issues.
Latest software update has solved a number of issues with my TV's which are performing pretty flawlessly now