I try to optimize the website https://www.onwalt.de
When I use Lighthouse within the Google Chrome DevTool, I get really good results and a time of 0.9 seconds for the Largest Contentful Paint (LCP) in desktop mode and a LCP of 2.3 s in mobile mode.
However, when I use PageSpeed Insights the LCP goes up to 8.2 seconds for mobile devices: https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fwww.onwalt.de%2F&tab=mobile
I get the same bad results with https://web.dev/measure/
Could anyone explain the difference?
I cannot find the reason. Yes, there are some render-blocking resources, but they cause max. 2 seconds.
What am I doing wrong?
The option "clear storage" is enabled:
