2949 (When 'the_content' filter applied and bbpress shortcode added to Admin Editor of Wordpress post, bbPress un-registers (or prevents WP from registering) the dashicons, and the editor.min.css stylesheet) – bbPress Trac
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Avoid trouble with filter and the_content in Wordpress - Hungred Dot Com
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Your theme must use the the_content filter in order for Brizy to work? – Brizy Help Center
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Adding a fixed text or element to all posts. The "the_content" filter — What about WordPress
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Adding a fixed text or element to all posts. The "the_content" filter — What about WordPress