ok – I have solved a little of this…
When you click on the search box it automatically suggests various places to you. e.g. near Johannesburg, South Africa.
If you select that and click search then there is nothing populated in to H1.
If you actually type in a location and search the H1 title appears.
Although, an additional suggestion on that would be that you refine the google map auto-complete to limit on the country/region that you have limited the system to… e.g. for me it’s South Africa, however, I get many US/EU addresses showing as I type.
Thanks and hope that helps.