Region screenshot doesn't work at runtime

Region screenshots taken in runtime do not seem to work while they do work when taken in editor.

1. In the level editor open the console and enter: HighResShot 1 50 50 120 500 0 0 1
2. Observe the screenshot 
3. Now Play in Editor and execute the same command
4. Observe the screenshot

Result: The screenshot in editor worked correctly but the screenshot from PIE did not.

Expected: Both screenshots should be the same.