How to reproduce:
1. Open user attached project "20190215_test.zip"
2. Set Game View Resolution to Fixed Resolution 1000x1000
3. Resize Game View Window so that the width of the Game View does not fit into the window and is resized
4. Observe game view

Expected result: Depth of field is applied correctly
Actual result: Depth of field is not applied to the right side of the Game View

Reproducible with - 2019.2.0a6
Not reproducible with - 2018.3.6f1, 2019.1.0b4, 2019.2.0a5

PostProcessing reproducible with - 0.1.7; 2.1.3

Notes:
1) This is only reproducible when Type of the resolution is set to Fixed Resolution and not to Aspect Ratio
2) Could not reproduce with 2017.4 because the project did not load correctly