On the analog dashboard of the ICE 3M (DB BR 406) from SKA, the "B" does not illuminate when LZB is activated. B = LZB Bereit (LZB ready) The "B" is present on the HUD so I think it's a bug. Sorry about the image quality, but here is an example of how the dashboard should look in reality with PZB and LZB enabled.
Matt did a German Signals stream/video on August 22nd where he pointed out this bug and said he’s made a note about it. Apparently still not fixed, or maybe fixed internally waiting for release.