Cumulative Layout Shift metric not shown on summary or detailed page when value is 0

[ThimoCode]

Have you read the documentation?

• Yes, I've read the how to make a reproducable bug guide
• Yes, I've read the how to debug my script guide

URL

https://example.com

What are you trying to accomplish

When CLS is 0, it should still show the metric and its value (0) on both the summary and detailed page.

What browser did you use?

Chrome

How to reproduce

Run on example.com:

docker run --rm -v "$(pwd):/sitespeed.io" sitespeedio/sitespeed.io:38.2.0 -b chrome https://example.com/

Check both index.html and detailed.html and see that CLS is missing. If you check the timing summary on the page itself, you can see the CLS is 0.