Help with Largest Contentful Paint is more than 5 seconds

Hi I am trying to figure how is it possible that my page speed is so bad on mobile devices and Google page insight says that one of my background images which has 100kb is taking more than 5 seconds to load on mobile…how the hell is that possible?

I mean even now it has really poor quality but i thought at least the speed will be fine, but it is not. I also tried putting there even smaller image and it still takes more than 5 sec to load.

load setting is on eager, if i set it to lazy it changes to 6,5s!!

not to mention that also some JS is taking too long to load but from what i read here on the forum there is not much to do about it, like Re-captcha JS, etc.

main domain of the web is: www.spotflow.io on which you can try to test the speed.

On desktop it is okay, overall site speed is around 90 which is great, but on mobile this degrades the page to around 49%.

thanks for any input!


Here is my site Read-Only: LINK

Changed the background img to 50kb and i still get a results with around 6000 ms of blocking time, loading this image etc. Can please anybody help? On support i just got some generic answer without any help…

Still without solution, my hero illustration has 120kb and the LCP is more than 3s on mobile…

hi @Daniel_Kovalik getting in

  1. Lighthouse - mobile emulation no throttling → LCP 0.22s and 90+
  2. Performance Insights - throttling by ‘Fast 3G’ → LCP 2.38s
    These values look fine to me.

I’ve had the same issue too. I’ve even created a new page which just a Rich Text element with the default dummy content, and that page STILL has over 5 seconds LCP. What’s going on?