Steps to reproduce:
1. Open attached “CurveValues.zip” Unity project
2. Open “Test” scene
3. Select “Renderer1” object in Hierarchy
4. Copy Trail Renderer component in Inspector
5. Select “Renderer2” object in Hierarchy
6. Paste Component Values for Trail Renderer in Inspector

Expected results:
Curve changes after pasting component values
Actual results:
Curve is not updated and remains the same as before until object is reselected

Reproduced in: 2018.1.0a6, 2017.3.0b11, 2017.2.0p3, 2017.1.2p3, 2017.1.0b1

Note: Reselecting object in Hierarchy causes the curve to update. Reproduced with Trail Renderer, Line Renderer components.