To reproduce:

1. Download attached project "UI Scenario.zip" and open in Unity
2. Open "test" scene
3. In Hierarchy select Canvas > Bottom Menu
4. Try to rename "Button (1)" game object
Note: Observe that renaming should work
5. Try to duplicate "Button (1)" or whatever you named game object

Expected Result: Renaming should work again without any problem
Actual Result: Renaming does not work

Note:
- If you go to Play mode and then exit it then this issue will vanish but only until the next duplicate

Reproduced on Unity 2017.2.0b7, 2017.2.0b11 and 2017.3.0a7
Not reproduced on Unity 5.5.4p4, 5.6.3p3, 2017.1.1p1 and 2017.2.0b6
Regression on Unity 2017.2.0b7