So I was playing a service on SKA to take a look at the reworked 146.2. This is what PZB told me to do after passing the signal at Aachen Rothe Erde. I'm not completely sure what I'm supposed to do to be honest It was a run towards Aachen and the signal was red as I stopped, only turning green after I closed the doors. I therefore was under 500Hz when I stopped and then passed the signal with a now active 1000Hz magnet, in case someone is interested in how to maybe replicate this. As a unrelated bonus, here is a derpy image of a HST I took sometime in the past:
Very weird, seems like an issue that's been there for a while as well. https://forums.dovetailgames.com/threads/db-br146-2-pzb-v-überwachung-1-km-h.28045/ At the right angle, almost anything will look derpy