Reproduction steps:
1. Open the attached project;
2. Open the scene TestScene;
3. Build like WebGL project;
4. Open the project in Chrome browser (important);
5. Press ‘P’ to hide the mouse cursor;
6. Move the mouse a very short distance;
7. Use the scroll wheel a lot (backwards or forwards) while moving the mouse;

Actual result: sometimes the values of x and y axis are so much bigger than it should be by moving the mouse a very short distance.
Expected result: the values of x and y axis should accord the moving of the mouse.

This bug shows up just in Chrome browser. In Mozilla Firefox the project works properly.

Reproduced with: 5.2.3p3, 5.3.6f1, 5.4.0f3, 5.5.f03, 5.6.0b2

Note: sometimes the bug reproduces after the long time of moving the mouse cursor. It is important to follow all the reproduction steps because otherwise the issue does not reproduce.

Reproduced with Chrome Canary (Version 57.0.2983.0) and Chrome (Version 55.0.2883.87) browsers.