One year-plus on... I'm having the same problems with filtering in the Google Maps viz (I'm running latest Joomla, latest Github).
(a) When "Reset Filters" in the menu item is set to "yes", it's not possible to set the over-list filters on the visualization at all - on clicking "Go", the filters are reset.
(b) When "Reset Filters" in the menu item is set to "no", the over-list filters work OK, but it's not possible to reset them, either with the "Clear" button or by reloading the page.
HOWEVER, with the modification to components\com_fabrik\models\visualization.php line 377 suggested by
apemraimondo above, that is changing $router->setVar('resetfilters', 0); to $router->setVar('resetfilters', 1); the following happens:
(c) When "Reset Filters" in the menu item is set to "yes", it's not possible to set the over-list filters on the visualization at all - on clicking "Go", the filters are not applied. On reloading the page, the filters are reset.
(d) When "Reset Filters" in the menu item is set to "no", the over-list filters work OK, and it's possible to reset them with the "Clear" button, but reloading the page does not reset the filters.
I can live with (d), using the modified visualization.php, for the time being, but there's clearly something wrong with the logic somewhere - finding out where that is, is beyond my pay-grade!
Regards, John