Nope, 2014 and 2015 (when I travelled) Hanover was an official stop and there was a train to Amsterdam/Brussels and one to Warsaw/Prague. Both stopped in Hanove

Nope, 2014 and 2015 (when I travelled) Hanover was an official stop and there was a train to Amsterdam/Brussels and one to Warsaw/Prague. Both stopped in Hanover between 2am and 3am. I remember the train eastwards was split in Berlin-East. In Hanover I gave my printed reservation to the polish train conductor who told me he'll wake me up when we'll arrive.