Search bar not working in liferay.design/lexicon reference site

[john-co]

Describe the bug
When landing on the URL for Lexicon components: https://liferay.design/lexicon/get-started, the search bar does not work. Refreshing the page resolves the issue. But after navigating to a different page the search bar doesn't work again until refresh page.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://liferay.design/lexicon/get-started/
2. Try to search for something on search bar
   https://user-images.githubusercontent.com/35235266/116726476-2d982180-a998-11eb-8c0f-f23e62d04015.mp4

Expected behavior
Able to search for keywords and shortcut to interested page

Desktop (please complete the following information):

• OS: Linux Mint
• Browser Chrome 89

Additional context
see video capture