The PZB is bugged pretty bad on this route, especially with the BR101 where it will trigger emergency brake without you actually being under magnet control, for example, driving to Lubeck, just before Bargteheide, there is a speed reduction sign to 90kph, accompanied by a 1000hz magnet, i acknowledge this and slow down to 90kph, as i should, however! Once i slow down below 90kph, i then pass a signal, the magnet control is then lifted, shortly after this i will get PZB’d to a halt.
You need to slow down to 85 kmh (preferrably ~80) in mode 'O' when the 1000hz light comes on. Once that clears & PZB monitoring releases, then you can go up to 90 kmh (or whatever the new speed limit is).