Reproduction steps:
1. Open the attached project "sprite-atlas-load-sprite-failure.zip";
2. Open the scene1.unity;
3. Enter a play mode;
4. Press "Load Image" button;
5. Observe three images in the Game View.

Expected results: all three images will look the same.
Actual results: Only one on the right looks like expected.

Reproduced on. 2017.1.3p3, 2017.1.4f1, 2017.2.3f1, 2017.3.2f1, 2018.1.1f1, 2018.1.1f1, 2018.2.0b5, 2018.3.0a1.
Not reproduced: 2017.1.3p2 or lower.

Reproduces on both OSX and on the iOS build.

Note: If pressing "Load Image" button again after the first time, second time sprites are loaded correctly.