Blank screen in 2015 and 2016 TV Models

I have submitted an app for all Tizen models (2015-> 2019). The app uses SDK version 2.3 to be compatible with all devices. The app passed the certification process for all models except for 2015 and 2016. The attached review video shows blank screen when the app start on 2015 and 2016 model (just a blank screen)

I thought it is a JavaScript issue so I submitted the app again after reviewing and modifying all startup code to be protected by try and catch and showing an error page that reports the exception. Also I have registered a global onError event to catch any unhandled exceptions and shows the error page as well.

Unfortunately, the next version failed with the same issue (blank screen). No error page is shown. Now I believe it is not a JavaScript error. It looks like the HTML page is never loaded or being aborted while loading!

I have physical TVs for test purposes but unfortunately none of them are 2015 nor 2016. Also I can’t find 2015 emulator to test.

Anyone knows any hint? Do you know any special consideration for 2015 models?

Any Ideas are appreciated I feel like fighting in the dark!

Thanks and best regards

I feel your pain, did you ever manage to fix this?