Spliting wire: voltage behaviour
It's easy.


You can't have short-circuits on ideal voltage sources. Infinite current would have to flow.
You can't have open circuits on constant-current sources. Infinite voltage would be generated.


In the real world the voltage source's internal resistance would cause the voltage to sag and the voltage drop would occur in the voltage source. Alternatively the electronic current limiter would cut-in and limit the current which in turn would cause the voltage to drop.