I've been playing around this on my server and I've been unable to reproduce the issue. Would you be able to provide a bit more info:
1. Version of Tableau Server and Tableau Desktop in use.
2. Screenshots of behavior.
3. A packaged workbook with sample data to reproduce the issue.
As i understand, while you're on the worksheet, when you click on a filled region/country the view would zoom in and when you click outside on the white space, it would reset to original maps?
You can achieve this by using "actions". I've attached a sample workbook. Let us know if this is what you're looking for.
For the map to get reset to the original position, you have to click on the Home icon which appears on the map.
The other alternative is use a action filter.
Maps.twbx 1.1 MB