Steps to reproduce this issue:

1. Import the attached package (MultiLineFieldBug)
2. Open 'scene'
3. It has an input field and a button which changes field to multiline and its size onClick
4. Enter long text into input field to exceed its size
5. Disable toggle:
-It will change InputField size OnClick
-Then will change it to multiline
6. Click button
7. Notice input field became bigger but text does not appear correctly
8. Click on InputField
9. Now it updates and all the text is displayed

Captured reproduction of the bug: http://screencast.com/t/PEvy9ltobeHn

If Toggle is enabled:
-It will first change intput field to multine line
-Then change its size
And it works fine