Steps to reproduce:
1. Open attached project.
2. Select "BadButton" and duplicate it several times.
-Button duplicates at the same position every time you duplicate it.

Current result: ILayoutGroup does not work as intended without ILayoutElement.
Expected result: ILayoutGroup should work as intended without ILayoutElement attached.

Reproduce expected behaviour:
1. Open attached project(if you didn't already);
2. Select "GoodButton" and duplicate it several times.
- Buttons one by one fills all the space in "Working grid" (See the attached image);

Reproduced on: 5.4.0f3,5.3.5f1;