ms:waitForAppLaunch capability of WAD is not working with appium

[krevathi1912]

I am automating UWP app using appium with WinAppDriver using python language. I am using ms:waitForAppLaunch = 50 capability of WAD, to wait for 50 secs after app launch is initiated prior to attaching to the application session, as some elements of the app takes time to initialize. This capability when used with appium, the winappdriver not waiting 50 secs to attache the app session. Where as when i run winappdriver seperately and start tests, the WAD is waiting 50 secs to attach the app session. Appium team said, its the issue with WinAppDriver. Appreciate any help

Issue logged in appium: appium/appium#14490

WinAppDriver 1.2 RC
Appium: 1.16.0

Code used

    desired_caps['platformName'] = "Windows"
    desired_caps['deviceName'] = "WindowsPC"
    desired_caps['app'] = "..................!App"
    desired_caps["ms:ms:waitForAppLaunch"] = 50
    self.driver = webdriver.Remote('http://localhost:4723/wd/hub', desired_caps)

[krevathi1912]

@naeemakram, request any help in this issue

[liljohnak]

@krevathi1912 do you have a splash screen in the app you are testing? If so this may help.
#611 (comment)