No, it isn’t. I’ll look into it some more as to whether or not it should be applying that filter. The main problem I see with it is that if shortcodes get parsed there can be a lot of display issues on Discourse.
For the moment, you can apply the filter yourself, or apply the as3cf_filter_post_local_to_s3 filter. You can do this by hooking into the wp_discourse_excerpt filter that the plugin applies to the post content that’s published from WordPress to Discourse. Only try this if you have someway of accessing the backend of your site in case something goes wrong when adding the code. Try one or the other of these code snippets to your theme’s functions.php file.
add_filter( 'wp_discourse_excerpt', 'wpdc_custom_excerpt' );
function wpdc_custom_excerpt( $content ) {
return apply_filters( 'as3cf_filter_post_local_to_s3', $content );
}
add_filter( 'wp_discourse_excerpt', 'wpdc_custom_excerpt' );
function wpdc_custom_excerpt( $content ) {
return apply_filters( 'the_content', $content );
}