Mini editors show text double

[simurai]

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: http://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: http://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

Text in mini editors show double, split in half.

Steps to Reproduce

1. Open style guide
2. Go to "Popover List"

Expected behavior:

Text should only say User input

Actual behavior:

Text says User User input and when scrolled another input

Reproduces how often:

100%

Versions

Atom    : 1.19.0-dev-85e65ffd1
Electron: 1.6.9
Chrome  : 56.0.2924.87
Node    : 7.4.0
apm  1.18.1
npm  3.10.10
node 6.9.5 x64
python 2.7.10
git 2.12.2

macOS Sierra

Additional Information

[winstliu]

The initial text isn't disappearing as expected and is being duplicated when the correct text is set in the text editor.