Hello,

since the major update an wpDiscuz 7.x there is an error within the method _getWPComments of the file /wp-content/plugins/wpdiscuz/class.WpdiscuzCore.php

In case of non paging comments the array $this->commentsArgs haven't an argument offset like in version 5.3.5.

This missing argument is relavant for the creation of the redis key within WordPress core method get_comments within WordPress core class class-wp-comment-query.php:

$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );
unset( $_args['fields'] );
$key = md5( serialize( $_args ) );
$last_changed = wp_cache_get_last_changed( 'comment' );
$cache_key = "get_comments:$key:$last_changed";
$cache_value = wp_cache_get( $cache_key, 'comment' );

See also:
https://github.com/WordPress/WordPress/blob/master/wp-includes/class-wp-comment-query.php#L429

If your WordPress uses a redis plugin like Redis Object Cache and you will click on the "Load more comments" Button, the same initial comments will be loaded.

Many enterprise bussiness sites based on WordPress are using caching, so please fix this issues.

Best regards,
Ben