Map doesn't respect "aria-hidden="true"

[josefnorlin]

I try to make the map hidden for screen readers by setting a div container to aria-hidden="true" but the map and controls in it doesn't respect it, leaving screen readers having to tab through in blindness.

Expected behaviour: All controls and the map itself gets hidden when I write aria-hidden="true" in its wrapper. Today it doesn't.

See example code here:

Any ideas why? Is this any functionality can be added here or is this up to Google?