So is the summit of Mont Blanc/Monte Bianco internationally considered to be in France? Can't find a definitive answer in a quick google. I know Italy considers it to be on the border, but I noticed that the mountain question doesn't have France tied for second place.
The French consider it French, the Italians consider it shared. The real, actual answer, is that, even in France and Italy, nobody really cares (but, to be fair, France does control it).
https://en.wikipedia.org/wiki/High-speed_rail_in_Indonesia