I have had this twice when driving an ICE 3 and entering Wurzburg (Or may have been Fulda) the system gioes from LZB to PZB with everything activated and I get a loud alarm in the cab which nothing will silence although train carries on working ok. I also had similar on Tharandter Ramp approaching the Dresden area driving a 612 and was changing from GST/GNT to PZB same loud alarm that I cant get rid of but train carries on normally, am I doing something wrong or is there a bug present?
When the trains flashes Ende on the bottlm right you press PZB/LZB release this must be the reason since you claim to be entering würzburg which isn’t an lzb zone
Fulda is an LZB zone- it's Wurzburg which isn't. At Fulda you can let the computer auto-control right down to the stop (if you aren't too fussy about stop accuracy, or prototypical operation)