MapBox Symbol doesn't act like markers properly (clustering, click..) - mapbox

Question

I am trying to make moving cars on MapBox using new promising GL Symbol layer/source. It looks very nice both on android and ios, but I faced with two impossibilities.
Symbols are always clustering. setIconAllowOverlap() and setIconIgnorePlacement() don't help: on some zoom it WILL be clustered. On both platforms.
How can I disable symbols clustering completely?
UPDATE: the code and even fast solution! (possibly bug? see comment at withTextField)
in onStyleLoaded():
...
carManager = new SymbolManager(mapView, mapboxMap, style);
carManager.setIconAllowOverlap(true);//doesn't help
carManager.setIconIgnorePlacement(true);//doesn't help
...
in drawCarFunction():
...
SymbolOptions carOptions = new SymbolOptions()
.withLatLng(latLng)
.withIconImage(carPlate)
//.withTextField(carPlate) //!!!! here it will cluster if text exists, and will NOT - without any text
;
Symbol car= carManager.create(carOptions);
carSymbols.add(car);
...
Next question:
On Android we have symbolManager.addClickListener() , but how could I catch a click on iOS? I know I can catch the tap, calculate nearest marker etc but
How to get symbol click simpler in swift?
In Moving cars task I should enumerate existing cars, move running, add newest. Where should I store cars IDs to get it later on next move? Where are no even symbol.setTag() option... Storing IDs in snippet (as on GMaps) is not that choice I expected from MapBox. Sure, I can make an array of pairs "car ID = symbol ID", but
How to store my own UID in the symbol?
UPDATE: the code. Note the comment near getTag()
void moveExistingCarOrAddNew(int carId, LatLng newLocation){
for (int i = 0; i < carManager.getAnnotations().size(); i++) {
if (carManager.getAnnotations().get(i).getTag()==carId){ //but no getTag() here, I should fit data into text fields
car.setLatLng(newLocation); //move!
} else {
...//create new marker as shown above }
}
}
}