Inspected your site and CSS. Your theme is using a grid layout and wrapping the results box in that grid. i cant even click on the individual phone number but when I inspect that div line in the result
to see the formatting, the results wrapper is inherited from div inside article. In that wrapper you have no label.
Basically your theme is overwriting how the results are being displayed.
The labels are populated because they appear in the INFO MAP Bubble.
that is outside the realms of what the basic free plugin does. We cannot overwrite your theme. SLP is working as it should.