Hello,
Thank you for contacting Rank Math today.
I have just tested this on the Classic editor and the block editor but I cannot reproduce any saving issues. Here is an example post:
{"@context":"https:\/\/schema.org","@graph":[{"@type":"Book","name":"Book Schema","author":[{"@type":"Person","name":"author_name"}],"url":"https:\/\/testurl.com","hasPart":[{"@type":"Book","bookEdition":"Edition","bookFormat":"https:\/\/schema.org\/EBook","datePublished":"04\/22\/2020","isbn":"123451","name":"Edition title","url":"https:\/\/urlhere.com","@id":"https:\/\/urlhere.com"}],"review":{"author":{"@type":"Person","name":"admin"},"datePublished":"2020-04-14T01:47:47+05:30","dateModified":"2020-04-14T01:47:47+05:30","reviewRating":{"@type":"Rating","ratingValue":"5","bestRating":"5","worstRating":1}},"image":{"@type":"ImageObject","url":"http:\/\/localhost\/rankmath\/wp-content\/uploads\/2019\/07\/sushi1.jpg","width":640,"height":886}},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"http:\/\/localhost\/rankmath","name":""}},{"@type":"ListItem","position":2,"item":{"@id":"http:\/\/localhost\/rankmath\/blog-2\/","name":"Blog"}},{"@type":"ListItem","position":3,"item":{"@id":"http:\/\/localhost\/rankmath\/uncategorized\/","name":"Uncategorized"}},{"@type":"ListItem","position":4,"item":{"@id":"http:\/\/localhost\/rankmath\/uncategorized\/book-schema\/","name":"Book Schema"}}]}]}
We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WP logins in the designated Sensitive Data section.
It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look forward to helping you.