Can only see imported mesh from certain angles

Duplicate post: Can only see imported mesh from certain angles - Pipeline & Plugins - Epic Developer Community Forums

Hello, so I have this simple mesh I’ve made in blender:

After importing it into UE4 I noticed that it’s individual faces/planes are only partially visible: depending on the angle you’re view them from.

Here is an example:

Here, only part of the faces are visible, but if you shift over a bit:


You can see some of the earlier missing faces.
And if you continue even more:


You can see a different number of faces,
I only the faces closest to you are invisible,
how can I fix this?

So, how do I fix the issue of difference faces showing different angles depending on your viewpoint? Is this a bug?

I’ve tagged this as a bug, but if it turns out that it’s my fault and I forgot to check a checkbox or something, I will untag it.