Scripts Cannot Access Internet When In Editor?!

This is a really strange one, im not sure whats going on but it looks like none of my scripts can access the internet when running in the editor. When running on iOS or Android they are totally fine.

They used to work just fine, I cant remember at what point that they stopped working. I have a number of third party libraries, could one of them somehow be interfering with Unity's ability to talk to the internet?

Is there some setting in Unity "DisableInternetConnection" or something?

This is really strange!