This works for me in the web version of the ward directory just not in the android mobile Tools app.
I believe the Tools behavior is similar to what is available via LCR, and different than what is shown via
https://directory.churchofjesuschrist.org/
In Tools, clicking the map for a member shows just the member's house mapped. In LCR, clicking the address for a member, brings up the map with just the member's house mapped. But on directory.churchofjesuschrist.org, the displayed map shows all the members' addresses mapped.
Others will remember better if Tools previously worked like the directory instead of LCR. But I personally prefer the Tools app on my cellphone having the LCR behavior. If my cellphone's display was cluttered with a ton of mapped addresses when I simply wanted to know where one member lived, that would be annoying (to me). And if I have to use my cellphone, I could always use a browser to navigate to the directory and see the ward map there.
But perhaps I misunderstood what you were pointing out.