FAQ

• Yes, my issue is not about variability or throttling.
• Yes, my issue is not about a specific accessibility audit (file with axe-core instead).
• Yes, my issue is not answered by other FAQs.

URL

https://gazofitness.hu

What happened?

Lighthouse 13.0.1 reports NO_LCP error inconsistently on a fully rendered page. The filmstrip clearly shows the page loading correctly with all content visible, but LCP element is not detected. The issue is inconsistent - sometimes LCP is detected correctly, sometimes NO_LCP is reported on the same page within minutes of each other.

Other tools (GTmetrix with Lighthouse 12.6.1) correctly detect LCP at 1.3-1.4s. WebPageTest also detects LCP correctly. Only Lighthouse 13.0.1 (via PageSpeed Insights) fails to detect the LCP element inconsistently.

The page is a WooCommerce store built with Porto theme. No errors in HAR file, page loads correctly in browser.

What did you expect?

Lighthouse should correctly detect the LCP element and report a valid LCP time. The filmstrip shows the page is fully rendered with all content visible, so LCP should be detected and measured correctly, as it is in Lighthouse 12.6.1 (GTmetrix) which reports LCP at 1.3-1.4s.

What have you tried?

No response

How were you running Lighthouse?

PageSpeed Insights

Lighthouse Version

13.0.1

Chrome Version

No response

Node Version

No response

OS

No response

Relevant log output