Problem with Geomesa Kafka Consumers

I’m trying Geomesa Kafka and the GeoMesa Kafka Quick Start tutorial.
The producer writes features into Kafka data store and I can see new records in my Kafka topic.
However, my consumer

...
SimpleFeatureSource consumerFS = consumer.getFeatureSource(sft.getTypeName());
...
try (SimpleFeatureIterator iterator = consumerFS.getFeatures().features()) {
                System.out.println("Current consumer state:");
                while (iterator.hasNext()) {
                    System.out.println(DataUtilities.encodeFeature(iterator.next()));
                }
            }

every time returns empty iterator ( iterator.hasNext()=null ).

What could be the reason?

P.S. Writing records to the producer’s datastore, causes following WARN message:

o.l.g.f.k.s.KryoUserDataSerialization$   : Skipping serialization of entry: USE_PROVIDED_FID -> true