Event APP_RENDERING_FAILED never call

Hi, 

I am using Cloud View SDK to load PDF files on my web app and I also have an issue like this Pdf not loading - Adobe Support Community - 11112029

While waiting for this issue fixed, I'm trying to work around by redirecting to direct link if an error occurs with the current pdf file by using APP_RENDERING_FAILED callback but it seems to never be called. I have checked with some other events like APP_RENDERING_START and APP_RENDERING_DONE and all of them work fine. 

Am I misunderstanding the documentation or doing something wrong? 

Thanks,