Facebook Instant article Issue

I've been using IA for a while now. Today morning I open couple of articles on the mobile (facebook app) and all of them are showing empty. Just showing the title, the featured image and related articles. I went over to IA config section on the PC and I can see the complete code. everything looks perfect, just that articles appear empty on the FB app (even in the page manager app).

Anyone have any idea whats going on?

TIA

Im having the same problem, empty IA articles