Dropdown issue when running from jenkins

Have you tried to use selenium on it as well?

import org.openqa.selenium.By as By
import org.openqa.selenium.support.ui.Select as Select
import org.openqa.selenium.WebDriver as WebDriver
import com.kms.katalon.core.webui.driver.DriverFactory as DriverFactory

Select select = new Select(DriverFactory.getWebDriver().findElement(By.xpath("your elements pathway")))
String optionText = select.getFirstSelectedOption().getText()