Elements<> doesn't work properly when several threads work with same list

See example:

```
public class BaseTest {

static int flag = 0;

@BeforeMethod(alwaysRun = true)
public void setUp() throws IOException {
initFromProperties();
init(useDriver("chrome"), YandexSite.class);
}

@Test
public void testSample1() throws InterruptedException {
YandexSite.yandexPage.open();
YandexSite.yandexPage.searchField.input("av.by");
System.out.println("First result for search [av.by]: " + YandexSite.yandexPage.autoSuggestItems.get(0).getText());
flag = 1;
while(flag == 1){Thread.sleep(1000);}
System.out.println("First result for search [av.by]: " + YandexSite.yandexPage.autoSuggestItems.get(0).getText());
}

@Test
public void testSample2() throws InterruptedException {
YandexSite.yandexPage.open();
YandexSite.yandexPage.searchField.input("cloud");
while (flag == 0){Thread.sleep(1000);/*wait first thread init autosuggest items*/}
System.out.println("First result for search [cloud]: " + YandexSite.yandexPage.autoSuggestItems.get(0).getText());
flag = 0;
}

@AfterMethod(alwaysRun = true)
public void tearDown(){
WebSettings.getDriver().quit();
}
}
```

```
@JSite("https://www.yandex.by/")
public class YandexSite extends WebSite {
public static YandexPage yandexPage;
}
```

```
@JPage("")
public class YandexPage extends WebPage {
@XPath("//input[contains(@class,'input__control')]")
public TextField searchField;

@XPath("//li[contains(@class,'suggest2-item')]")
public Elements autoSuggestItems;

}
```

pom.xml
```

com.epam.jdi
jdi-uitest-web
1.1.18

org.apache.maven.plugins
maven-surefire-plugin
2.22.0


src/test/resources/suite.xml

${project.basedir}/test-output




```

```

```
_run mvn clean install_

Result output:

37:29.313 INFO: [ThreadID: 12]Input text 'av.by' in text field for TextField 'Search Field' (YandexPage.searchField; ; xpath='//input[contains(@class,'input__control')]')
37:29.920 INFO: [ThreadID: 12]Get text for Button 'Button' (.Button; Has WebElement)
37:29.968 INFO: [ThreadID: 12]Get result 'av.by' in 0.05 seconds
First result for search [av.by]: av.by
37:33.606 INFO: [ThreadID: 13]Input text 'cloud' in text field for TextField 'Search Field' (YandexPage.searchField; ; xpath='//input[contains(@class,'input__control')]')
37:33.714 INFO: [ThreadID: 13]Is element displayed for Button 'Button' (.Button; Has WebElement)
37:33.741 INFO: [ThreadID: 13]Get result 'true' in 0.03 seconds
37:33.750 INFO: [ThreadID: 13]Get text for Button 'Button' (.Button; Has WebElement)
37:33.772 INFO: [ThreadID: 13]Get result 'av.by' in 0.02 seconds
**_First result for search [cloud]: av.by_**
37:33.971 INFO: [ThreadID: 12]Is element displayed for Button 'Button' (.Button; Has WebElement)
37:33.997 INFO: [ThreadID: 12]Get result 'true' in 0.03 seconds
37:34.01 INFO: [ThreadID: 12]Get text for Button 'Button' (.Button; Has WebElement)
37:34.21 INFO: [ThreadID: 12]Get result 'av.by' in 0.02 seconds
First result for search [av.by]: av.by