Theme: Multi-Color by Nischal Maniar

Mods: I need help to fix my development issue and so please allow this thread.

Some of my posts are showing up in category page but NOT in the actual posts page. This is happening only for certain posts and i don't find any pattern behind this.

For example:
Here you can see my post is visible in category page:

Here it's NOT visible in actual post page:

Any help to fix this will be highly appreciated.