It looks like I've found a solution. It was necessary to configure consumer in a similar way (set EnableAutoOffsetStore = false):

k.TopicEndpoint<ConfirmationTokenCreated>("confirmation-token-created-topic", "group1",
                        e =>
                        {
                            e.EnableAutoOffsetStore = false;
                            e.EnablePartitionEof = true;
                            e.AutoOffsetReset = AutoOffsetReset.Earliest;
                            e.CreateIfMissing();
                            e.ConfigureConsumer<ConfirmationTokenCreatedConsumer>(context);
                        });