Can't save Wi-Fi proxy

I require a proxy to be set on my iPhone W-Fi connection to be able to develop the mobile site, however iOS9 is not saving the proxy settings. After I enter them, click back then come back in the HTTP proxy is set to "Off" instead of "Manual".

This is a HUGE problem for me, and worked on iOS8 (the last time I was developing the mobile version of the site was before iOS9 release). Does anyone else have problems with this, because I am now being hindered in my work.

iPhone 6S