I have issue with feature image loading on single post page. If i open any posts most of the time i can’t see feature image opening there while image is present(screenshot attached) while doing refresh or loading another time it might be appeared.
In this case, can you enable the jetpack plugin also can you provide me login access to your website? I will need to do further investigation on your website. You can send it here and don’t forget to check Set as private reply option below.