Selenium, clicking a button and secound iteration of a loop failing - selenium

Question

I have a test
public class SeleniumForh extends BaseTest {
private static List<String> FNR;
private static final int THREAD_COUNT = 1;
private static Set<String> THREADS = Collections.synchronizedSet(new HashSet<String>());
static {
List<String> fnr = new ArrayList<String>();
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(SeleniumManntallskryss.class.getResourceAsStream("/fnr")));
String line;
while ((line = reader.readLine()) != null) {
fnr.add(line);
}
FNR = Collections.synchronizedList(fnr);
} catch (IOException e) {
e.printStackTrace();
}
}
public SeleniumForhandstemmer(String platform, String browserName, String browserVersion) {
super(platform, browserName, browserVersion);
}
#Parameterized.Parameters
public static LinkedList<String[]> getEnvironments() throws Exception {
LinkedList<String[]> env = new LinkedList<String[]>();
for (int i = 0; i <THREAD_COUNT; i++) {
env.add(new String[]{"ANY", "firefox", "35"});
}
return env;
}
#Test
public void testForhand() throws Exception {
try {
System.out.println(System.currentTimeMillis() + " - " + Thread.currentThread() + ": testForhand");
THREADS.add(Thread.currentThread().toString());
do {
System.out.println(System.currentTimeMillis() + " - " + Thread.currentThread() + ": THREADS.size() = " + THREADS.size());
Thread.sleep(5000);
} while (THREADS.size() < THREAD_COUNT);
System.out.println(System.currentTimeMillis() + " - " + Thread.currentThread() + ": testForhand - ready to run");
WebDriver driver = webDriverThreadLocal.get();
driver.get("https://kill");
Assert.assertTrue(driver.getTitle().equals("Ehh"));
WebElement element = driver.findElement(By.xpath("/html/body/div/div[3]/div/div[2]/div/div/div/a"));
element.click();
WebElement brukerid = driver.findElement(By.xpath("/html/body/form/input[1]"));
brukerid.clear();
brukerid.sendKeys(new CharSequence[]{"2333"});
WebElement logginnknapp = driver.findElement(By.cssSelector("input[value=\"Login\"]"));
logginnknapp.click();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
WebElement rolle = driver.findElement(By.cssSelector("#event33"));
rolle.click();
for (int i = 0; i < 10; i++) {
System.out.println("Re nr " + (i + 1));
WebElement fo = driver.findElement(By.linkText("Ree"));
fo.click();
WebElement sted = driver.findElement(By.xpath("//*[#id=\"form:panel:tabell_dd_data\"]/tr[1]/td"));
sted.click();
takeScreenshot("nod");
WebElement velg = driver.findElement(By.xpath("//*[#id=\"form:panel:tabeller\"]/div/div[2]"));
velg.click();
WebElement fnrFane = driver.findElement(By.xpath("//*[#id=\"mand:manntallsSokForm:tabView\"]/ul/li[2]"));
fnrFane.click();
WebElement velger = driver.findElement(By.xpath("//input[#data-aft=\"fodselsnummer\"]"));
velger.clear();
String fnr = FNR.remove(0);
velger.sendKeys(fnr);
WebElement sokknapp = driver.findElement(By.xpath("//*[#id=\"mad:tabView:searchSSN\"]"));
sokknapp.click();
Thread.sleep(10000);
WebElement fnrTxt = driver.findElement(By.xpath("//*[contains(text(), '" + fnr + "')]"));
System.out.println("Fnr tekstelement: " + fnrTxt);
WebElement regStemme = driver.findElement(By.xpath("//*[#id=\"stemmegivning:form:markOffAdvance\"]"));
System.out.println("Knd: " + regStemme);
regStemme.click();
driver.findElement(By.xpath("//*[contains(text(), 'bd')]"));
driver.get("https://y");
driver.findElement(By.xpath("//*[contains(text(), 'Min side')]"));
}
} catch (Exception e) {
e.printStackTrace();
throw e;
} finally {
System.out.println(System.currentTimeMillis() + " - " + Thread.currentThread() + ": testSimple - test finished");
}
}
}
The problem is that when running the secound iteratoion the button I want to click is just marked with a square around it in the running browser, not cliked. This happens everu time on the second (not the first iteration), I have tried sleep between iterations and have also confirmed that the button i sfound, so the problem is the click function. And I can see it tries to click because a square is apperaring around the buttoon.