Microprofile @Fallback not working in native image mode

Question

Having the following code running on Quarkus:

@Singleton
@RegisterForReflection
public class StoreService {

    private static final Logger LOGGER = Logger.getLogger(StoreService.class);

    @Inject
    @RestClient
    StoresApiClient client;

    @CacheResult(cacheName = "stores")
    @Fallback(fallbackMethod = "allFallbackStores")
    public List<Store> allStores() {
        // call REST API using client
    }

    @SuppressWarnings("unused")
    public List<Store> allFallbackStores() {
        try {
            LOGGER.info("Falling back to internal stores list");
            ...
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

the fallback mechanism is working properly in regular JDK mode. On the other hand in native image mode, @Fallback annotation is not being respected and an exception is thrown after unsuccessful API call. What might be a reason for that if @RegisterForReflection annotation is in place?