Custom Permalinks - Redirection Issue with Trailing Slash

Overview of the issue

When using the the Custom Permalinks plugin, you may experience unnecessary 301 redirects when accessing URLs with a trailing slash.

Workaround

Please, make sure of having a full site backup of your site before proceeding.

• Open the …/wp-content/plugins/custom-permalinks/includes/class-custom-permalinks-frontend.php file.
• Replace:

  			// Append any query compenent.
  			$url .= strstr( $this->request_uri, '?' );
  
  			wp_safe_redirect( home_url() . '/' . $url, 301 );
  			exit( 0 );
  		}
  	}
  

• With:

  			// Append any query compenent.
  			$url .= strstr( $this->request_uri, '?' );
  			$home_url = home_url();
  			if (substr($home_url, -1) == '/'){
  				wp_safe_redirect( $home_url . $url, 301 );
  			} else {
  				wp_safe_redirect( $home_url . '/' . $url, 301 );
  			}
  			exit( 0 );
  		}
  	}