Approaching the end of the LZB section (north of Hanau) you see the reduction in speed to 160kmh on the LZB gauge, but you don't get an LZB Ende indication and there is no way to leave LZB even though the cable in between the tracks has disappeared, and you are clearly driving using PZB signals, but still getting all the LZB indications in cab.
I have done some more testing. I don't know if this is a train specific thing. I drove the same route with the BR401 and the Expert BR101 and did not have this issue. But the BR411 and the Vectron still failed to leave LZB north of Hanau.