How to reproduce:
1. Open the attached Unity project
2. Open scene named "SampleScene"
3. Press "Play" button
4. Move around with "WASD" or arrow keys
5. Observe the game view while you move around the camera

Expected result: No screen tearing or glitches appear.
Actual result: A screen tearing appears while moving around the scene/game view.

Reproducible with - 2018.1.0b11, 2018.1.0f2, 2018.2.0a3, 2018.2.0b5
Not reproducible with - 2017.1.0a1, 2017.1.4f1, 2017.2.3f1, 2017.4.3f1, 2018.1.0a1, 2018.1.0b10, 2018.2.0a1, 2018.2.0a2

Notes:
- The screen tearing does not appear in build, only in editor.
- When the play button is pressed, the screen tearing appears in both game view and scene view.