Autocompletion doesn't always highlight matching text

Summary

The autocompletion in Markdown highlights matching text in the suggestions. This doesn't work for all suggestions.

Steps to reproduce

  • type /label ~b

What is the current bug behavior?

~"backup-restore" is not highlighted:

Screen_Shot_2017-05-22_at_21.47.32

What is the expected correct behavior?

All suggestions are highlighted.