[5.3.1p1] UnityWebRequest.Abort does not function on iOS or Android

I'm currently developing a class for uploading files to a web server and I have run into issues on both iOS (IL2CPP) and Android. It seems the calling Abort on a UnityWebRequest has no effect on either platform. I can confirm it works in the Editor on both Windows and Mac.

Has anyone else encountered this issue? I wanted to confirm that it was in fact a bug before sending in a bug report.

Another mobile only issue I've encountered is the progress properties of the UnityWebRequest (upload...

[5.3.1p1] UnityWebRequest.Abort does not function on iOS or Android