Google Search Console Page Experience/Core Web Vitals

[ABCbtqmedequip]

Hi everyone!

My website used to have 100% good URLs for over 1 month, however from the start of June it has gone down to 0% good URLs, even though the error of "LCP issue: longer than 2.5s (mobile)" has been cleared for 1 month. A couple of days ago another error has come up "Insufficient HTTPS coverage on your site", even though all URLs on the webpage are https and none are http which I found. 

Would highly appreciate any insight into how to get 100% good page experience URLs again!

Many thanks in advance!

[ABCbtqmedequip]

bump

[AlexSEO]

Have you tried crawling your site with a tool like ScreamingFrog to find your HTTP URLs?