Here is one example:

• https://imgur.com/o00WaG5 - This image shows a hacker news community when viewed via lemmy.world instance. Here no posts shows up and just a blank page.
• https://imgur.com/zDhLf1q - This image shows the same hacker news community when viewed from it its own instance where it was created i.e derp.foo
  Here every posts gets displayed.

So, why some community posts do show up only in the instance it was created? Or is it a lemmy bug?

This problem also occurs with some other communities.

Apologise for my bad english.