python-client: Appium cannot find element by ID, but can by XPATH

The problem

I’ve been working on dual Appium/Selenium test suite for a web page and mobile app. When using Appium, it is unable to find the element by ID. If I change it to use XPATH, it works as expected, then fails to find the next element by ID. This may not sound like a problem, but other elements in the app are not easily distinguished by XPATH values.

This test suite worked previously with manual app install and the Appium Service running on Mac. I’ve since tried to automate the process to install the application and run Appium Service programmatically. I am wondering if the way I’ve set this up is causing it not to detect elements by ID.

I know for certain the ID is correct. It works for the Selenium + web page combination, and I’ve tried digging into the app with Appium Studio. It displays the ID correctly in the app, and copy pasting the ID into my code doesn’t change anything.

Environment

• Appium version (or git revision) that exhibits the issue: All versions I’ve tried experience this (currently using 1.14.2)
• Desktop OS/version used to run Appium: MacOS Catalina
• Node.js version (unless using Appium.app|exe): 10.15.0
• Npm or Yarn package manager: NPM
• Mobile platform/version under test: Android 8.1
• Real device or emulator/simulator: Real Device
• Appium CLI or Appium.app|exe: Appium CLI

Link to Appium logs

Unfortunately, it doesn’t look like the AppiumService in Python creates logs. If it does, I’ll attach them when I find them or somebody tells me where they are

Code To Reproduce Issue [ Good To Have ]

Code below (redesign_tags and redesign_locators contain some sensitive info, but they work as intended in the Selenium flow):

class Driver:
    desired_capabilities = {}

    def __init__(self):
        # AppiumService was not called in previous version
        redesign_tags.appium_service = AppiumService()
        redesign_tags.appium_service.start()

        self.desired_capabilities[redesign_tags.platform_name_label] = redesign_tags.platform_device_name_android_label
        self.desired_capabilities[redesign_tags.no_reset_label] = redesign_tags.no_reset_value
        self.desired_capabilities[redesign_tags.platform_device_name_label] = redesign_tags.platform_device_name_galaxy_8
        self.desired_capabilities["app"] = "/Path/To/android-app.apk" # this line did not exist in the old version
        self.desired_capabilities[redesign_tags.app_package_label] = redesign_tags.app_package_value_dev
        self.desired_capabilities[redesign_tags.app_activity_label] = redesign_tags.app_activity_value
        self.instance = webdriver.Remote(redesign_tags.link_to_wd_hub, self.desired_capabilities)
        time.sleep(10)  # wait for application install
        print("Installed application")

def setupDevice():
    if redesign_tags.platform == "Android":
        print("Installing application...")
        driver = Driver()
    elif redesign_tags.platform == "Chrome":
        options = webdriver.ChromeOptions()
        options.add_argument('--start-maximized')
        options.add_argument('--unlimited-storage')
        driver = webdriver.Chrome(options=options)
        driver.get("localhost:8100")
        redesign_tags.webdriver = driver
        driver.set_window_position(0, 0)
        driver.maximize_window()
    else:
        print("Invalid platform specified")
        return False

    print("Registering device...")
    pairing = PairingPage(driver)
    # this element is not found by Appium
    pairing_credentials = pairing.get_element_by_id(redesign_locators.pairing_credentials_button, 25)