Places Autocomplete API stops updating predictions (iOS) - ios

Question

I've implemented the Places autocomplete API in my iOS app, using a UISearchBar and UITableView to house the autocomplete predictions.
The implementation works, but sometimes -[GMSAutocompleteTableDataSourceDelegate didUpdateAutocompletePredictionsForTableDataSource:] simply doesn't get called.
The -[GMSAutocompleteTableDataSourceDelegate didRequestAutocompletePredictionsForTableDataSource:] is always called when the GMSAutocompleteTableDataSource instance is passed the -[GMSAutocompleteTableDataSource sourceTextHasChanged:] method.
I would expect either the above update delegate method or the -[GMSAutocompleteTableDataSourceDelegate tableDataSource: didFailAutocompleteWithError:] to be called at some point in response to a request, but again, this doesn't seem to always be the case.
Every now and then I just simply stop receiving updates regardless of what gets typed in the search bar, and no delegate method other than the request one gets called. The implementations for the delegate methods:
#pragma mark - Autocomplete Table Data Source Delegate
- (void)tableDataSource:(GMSAutocompleteTableDataSource *)tableDataSource
didAutocompleteWithPlace:(GMSPlace *)place {
NSString *state;
NSString *stateAbbreviation;
NSArray *addressComponents = place.addressComponents;
if (addressComponents) {
// Type of addressComponent is <GMSAddressComponent *> (absent from public header UPDATE: Is present in 1.12.)
for (GMSAddressComponent *addressComponent in addressComponents) {
if ([addressComponent.type isEqualToString:#"administrative_area_level_1"]) {
state = addressComponent.name;
break;
}
}
}
if (state && [[_stateAbbreviations allKeys] containsObject:state]) {
stateAbbreviation = _stateAbbreviations[state];
} else {
stateAbbreviation = #"";
}
NSLog(#"City: <%#> State: <%#> Abbr: <%#>", place.name, state, stateAbbreviation);
}
- (void)tableDataSource:(GMSAutocompleteTableDataSource *)tableDataSource
didFailAutocompleteWithError:(NSError *)error {
NSLog(#"Error: %#", [error description]);
}
- (BOOL)tableDataSource:(GMSAutocompleteTableDataSource *)tableDataSource
didSelectPrediction:(GMSAutocompletePrediction *)prediction {
NSLog(#"Selected Prediction: <%#>", prediction);
return YES;
}
- (void)didUpdateAutocompletePredictionsForTableDataSource:
(GMSAutocompleteTableDataSource *)tableDataSource {
NSLog(#"-[%# %#] called.", self.class, NSStringFromSelector(_cmd));
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
// Reload table data.
[_searchResultsTableView reloadData];
}
- (void)didRequestAutocompletePredictionsForTableDataSource:
(GMSAutocompleteTableDataSource *)tableDataSource {
NSLog(#"-[%# %#] called.", self.class, NSStringFromSelector(_cmd));
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
// Reload table data.
[_searchResultsTableView reloadData];
}