Reproduction steps:
1) Build attached project using unity 5.3.0p1 and run it on android 5.0 device.
2) Do not touch splash screen, once game menu loads try touching screen with one finger.
3) Notice how touch is not being recorded. Now touch screen with multiple fingers.

NOTE: If you touch screen during unity splash screen, touches will work fine.

Expected result: You can see mouse position being logged on the screen.
Actual result: Mouse position is only logged when multi touching.

Regression introduced in: 5.3.0p1