Put 2 fields both are SELECT on a form, and enable the “Ajax Processing” on the first, and check the "Use AJAX to reload other fields of type Select, Double select, Radio and Checkbox. ", double click the second SELECT.
And on the result form, when select the first SELECT, the second refresh and get data, that’s correct; but when click outside, the ajax process runs again.
It turns out that refresh twice when change a SELECT’s item, could that be fixed?