For example, https://www.openstreetmap.org/way/23339683 lists nodes in Linea 8 of the Madrid Metro. The first one listed is Nuevos Ministerios (1152687427). It does not have a square to the left and hovering the cursor over it does nothing. There are seven other named nodes which have a square to their left. Hovering the cursor over them produces a little yellow pop-up window that’s just big enough to contain “railway=station”.
Shouldn’t Nuevos Ministerios also have the property “railway=station”. After all, it is the end of the line, isn’t it, so the Linea 8 subways do stop there, don’t they?