Just noticed something about this distant signal, right outside of Kaiserslautern. It's not a repeater, but doesn't have a PZB magnet. Regardless it has to be acknowledged, if necessary. This route is still missing quite a bunch of PZB magnets...
RE 28034, leaving Neustadt at 18:53: When approaching Karlsruhe, the distant signal and its repeaters ahead of the main entrance signal show two ambers (expect stop). PZB magnets are working properly. The main signal itself shows one red (stop). No additional lights, no Zs1, no Zs7, no Sh1. The map instead shows the signal as green, and I was able to pass it without penalty using "PZB Befehl". Somebody gotta check those additional signal lamps...