It is very likely that you’re creating an infinite loop.
1) When ACF loads repeater 1 the filter to get the values from field 2 is called
2) This causes ACF to load repeater 2
3) When ACF loads repeater 2 the filter to get the values from field 1 is called
4) This causes ACF to load repeater 1 — loop back to #1
This can be solved in a couple of ways.
1) If you are familiar with how ACF stores the values of a repeater you can use the WP function get_option(), this avoids calling ACF functions and eliminates the infinite loop.
// example of getting repeater values without ACF functions
$repeater = 'repeater1'; // name of repeater
$count = intval(get_option('options_'.$repeater)); // gets # rows
for ($i=0; $i<$count; $i++) {
$value = get_options('options_'.$repeater.'_'.$i.'_sub_field_name';
}
2) In each filter, remove the hook for that filter and then replace it so that each filter can only be called oned.
// example of removing/replacing filter
function acf_load_uno_field_choices($field1) {
// remove this filter
remove_filter('acf/load_field/name=dropdown1', 'acf_load_uno_field_choices');
// your code to get values here
// re-add this filter
add_filter('acf/load_field/name=dropdown1', 'acf_load_uno_field_choices');
// return field
return $field1;
}
add_filter('acf/load_field/name=dropdown1', 'acf_load_uno_field_choices');
