Ok, so I took a look and I am seeing the same issue you are. I agree it is a bug.
In the Map view you have the capability of “hiding” the current location by setting Location Mode to “None”. But the map still centers on the current location when there is only a single data pin in the map. When Location Mode is “on”, the map probably should center on current location BUT initially should zoom appropriately to show ALL pins in the display. This doesn’t happen either with a single data pin.
The only way I can think of working around this issue, is to detect when there is only a single pin and open the Map view with that row already selected.
If you look at the system generated Inline Action, it uses a target formulated like this:
It might be possible to insert code to redirect the view in some way, when there is only a single address, to go to the same place. Though, I am not completely sure how to do that at the moment.