CloudSolrServer doesn't allow to index multiple collections with one instance of server

@Test
public void shouldSendToSecondCore() throws Exception {
	//given
	try {
		CloudSolrServer server = new CloudSolrServer("localhost:9983");
		UpdateRequest commit1 = new UpdateRequest();
		commit1.setAction(ACTION.COMMIT, true, true);
		commit1.setParam("collection", "collection1");
		//this commit is bug's cause
		commit1.process(server);
		
		SolrInputDocument doc = new SolrInputDocument();
		doc.addField("id", "id");
		doc.addField("name", "name");
		
		UpdateRequest update2 = new UpdateRequest();
		update2.setParam("collection", "collection2");
		update2.add(doc);
		update2.process(server);
		
		UpdateRequest commit2 = new UpdateRequest();
		commit2.setAction(ACTION.COMMIT, true, true);
		commit2.setParam("collection", "collection2");
		commit2.process(server);

		SolrQuery q1 = new SolrQuery("id:id");
		q1.set("collection", "collection1");
		SolrQuery q2 = new SolrQuery("id:id");
		q2.set("collection", "collection2");
		
		//when
		QueryResponse resp1 = server.query(q1);
		QueryResponse resp2 = server.query(q2);
		
		//then
		Assert.assertEquals(0L, resp1.getResults().getNumFound());
		Assert.assertEquals(1L, resp2.getResults().getNumFound());
	} finally {
		CloudSolrServer server1 = new CloudSolrServer("localhost:9983");
		server1.setDefaultCollection("collection1");
		server1.deleteByQuery("id:id");
		server1.commit(true, true);
		
		CloudSolrServer server2 = new CloudSolrServer("localhost:9983");
		server2.setDefaultCollection("collection2");
		server2.deleteByQuery("id:id");
		server2.commit(true, true);
	}
}