Plus sized phones with direct input plugin problems!

I have an app that uses a plugin that reads the touches at 60fps via a separate thread on IOS. This is so game can run at 30 fps but the drawing of the line stays smooth because we record input at 60fps…

We read the touches via

CGPoint loc = [touch locationInView:nil];

All this has worked perfectly until we finally tried game on Plus sized iPhone (6+,6S+ & 7+)…
On those machines Y coordinates are never below 270 and X only goes to around 1400.

Any help please!

silly mistake and needing to use contentScaleFactor. all fixed