Open select with keyboard (arrow down) for first time not working

[yawkale]

Describe the bug
Open select with keyboard (arrow down) for first time not working

To Reproduce

Otherwise

Steps to reproduce the behavior:

1. Open demo https://choices-js.github.io/Choices/
2. focus with keyboard to single select
3. press arrow down
4. option list opened and closed immediatly

Expected behavior
Option list shown

Choices version and bundle

• Version: 11.1.0

Desktop (please complete the following information):

• OS: any
• Browser any
• Version any