Reproduction steps:
1. Open the attached project;
2. Open the StencilTest scene;
3. Open the Frame debugger window;
4. In the scene view, observe the quad, notice that it is orange;
5. In the frame debugger, observe that after clearing GL, the quad is not in the stencil buffer.

Expected results: the quad should be drawn white;
Actual results: the quad is drawn with the different color as it should not be.

Reproduced on: 5.6.0f3, 2017.1.b1.
Not reproduced on: 5.5.0f3, 5.5.3f1.