Unable to click anchor tag in grid again after navigating to another page

Question

In the gridview I click the anchor tag in column KU_Total Qty following which I navigate to Grid in another page.

WebElement totalQty = ldriver.findElement(By.xpath("//td[@aria-describedby='jqTable_KU_Total Qty']/a[text()="+ qty + "]"));
            totalQty.click();

I click on back arrow button to navigate to original page

WebElement backButton = ldriver.findElement(By.xpath("//li/a[@id='lnkBack']"));
            backButton.click();

after which I'm not able to identify the KU_Total Qty located in next row giving no such element exception.

Below is the code

public void housingGridTotalQtyClick() throws Exception {

    WebDriverWait wait = new WebDriverWait(ldriver, 20);
    WebElement grid = wait.until(
            ExpectedConditions.visibilityOfElementLocated(By.id("gview_jqTable_KU")));
    grid = ldriver.findElement(By.xpath("//*[@id='gview_jqTable_KU']"));
    Thread.sleep(2000);
    List<WebElement> KUList = grid.findElements(By.xpath("//td[@aria-describedby='jqTable_KU_Total Qty']"));
    List<String> totalQtyList = new ArrayList<String>();
    for(WebElement KU: KUList) {
        totalQtyList.add(KU.getText());
    }
    for (int i=0; i<totalQtyList.size(); i++) {
        String qty = totalQtyList.get(i);
        System.out.println(qty);
        WebElement totalQty = ldriver.findElement(By.xpath("//td[@aria-describedby='jqTable_KU_Total Qty']/a[text()="+ qty + "]"));
        totalQty.click();
        
        WebElement backButton = ldriver.findElement(By.xpath("//li/a[@id='lnkBack']"));
        backButton.click();
    }   
}

Below is the No such element error that I'm getting when I want to click the anchor tag located in next row after navigating

org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"//td[@aria-describedby='jqTable_KU_Total Qty']/a[text()=551]"}