Reproduction steps:
1. Open the attached project "WorldSpaceText.zip";
2. Open the main.unity scene;
3. Enter a play mode.

Expected results: both text lines should be shown in the game view.
Actual results: only the line in the top which is without ContentSizeFitter is shown in the game view.

Reproduced on: 2017.3.1p1, 2017.3.1p3, 2018.1.0b10, 2018.2.0a3.
Not reproducible on: 2017.3.1f1, 2017.2.1p4, 2017.1.3p2.

By Design: Calling RectTransform.ForceUpdateRectTransforms after changing the 3D position is a workaround for this issue.