Subscribing to a Story Point Results in a Subscription Screenshot of a Different Point

When subscribing to a story point, the snapshot of the subscription shows a different story point.

Tableau Server

Select the story point you would like to subscribe to, and create a Custom View before subscribing.

Publish the underlying sheet or dashboard for the story point(s) and subscribe to the underlying source instead.

The default story point is the point that is selected upon publish to Tableau Server.
The selection of alternate story points is treated like a mark selection event. In other words, in selecting a different point, you have changed the view. Since the view has changed, it is altered from the original state, but that change is not yet saved. Therefore, when you select a different point and then subscribe, you are actually subscribing to the original view, which will show the original story point selection.