How to solve mesh dissapearing when inside of it?

Hello!

Im trying to currently solve an issue I have with my blackhole that I have setup. The distortion effect and everything works great, but when I get inside of the mesh, the object dissapears entirely. I want to set my blackhole up like the video demonstrated, but im unsure if the technique im using will allow it.

Method of blackhole im using: Black hole setup in UE4 - YouTube

Blackhole:

https://i.imgur.com/Y2d7pyJ.png

Dissapears when inside:

https://i.imgur.com/wY1lM8d.png

Blackhole setup:

https://i.imgur.com/PIL7fiG.png

Video of what I want to replicate: Wormholes and Singularities Unreal 4 - YouTube

Managed to fix this by enabling two sided material in the material itself.