Hi there,
i am not sure on this as PSI report doesn’t give any valid reason as to why their is such a big difference between FCP and LCP – and testing on other sites there doesn’t seem to be a issue.
If i open the Chrome Dev Tools ( Right Click > Inspect the page ) there are some issues to address.
1. Theres a bunch of JS errors in the Console – which look related to Adverts.
2. Opening the Performance tab and running a performance report i see this:
https://www.screencast.com/t/5wL60l4A
You can see the HTML Document – which is sandwiched between a lot of ad scripts.
Speak with Advert providers support to fix the JS errors.
And look for a plugin like Flying Scripts to defer the loading of the adverts javascript.
Can’t say if any of these are the issue – but i cannot see any other problems.