Well riddle me this. What if you hold two ducal titles. Electors in one of them are voting for a different guy. Does your heir still get the other title? Is the game smart enough for that?
Each duchy will have its own people elected (in case of elective succession of course), so if your heir is not voted in majority by the electors for one of the duchies after the current ruler of that said duchy dies, then your heir won't pick up that title.
A quick question: I have it set so that I receive a pause and pop-up every time a building is completed in my demse. However, I can't find any way to get any kind of notification when buildings are completed in lands held by my vassals. Since I have yet to see any vassal actually try to build anything on their own, it falls to me to do it for them. This process, in turn, becomes a real pain in the butt because I don't receive any notifications when any of their buildings are finished.
How can I fix this, other than simply refusing to title-out anything to vassals and suffer "Demse to Big" penalties 'til my dying day?
Go to Main Menu -> Message Settings and you will be able to set up the way you want every notification in game