When Selecting Frankfurt(Main)HBf as destination the LED screens says Wiesbaden HBf is this accurate or game issue
Wiesbaden is very close to Frankfurt, some trains stop there after arriving at Frankfurt from Munich. So perhaps it depends on which timetabled service you are driving. Whether it continues to Wiesbaden or not in the real world.
This is on Hauptstrecke München - Augsburg right? With the BR403's? I believe the destination boards were a rushed job, since some of the selections appeared to be bugged as you've pointed out. Theres some where it'll just display a single line of dots continuously "...." Very few selections offer intermediate stops, while the rest just displays the end point and thats it. Its a shame really, considering that the BR406 doesn't share these issues at all despite sharing the exact same destination board design and setup.