befor & after textbox

Twenty 20 Even if you type in the before and After text boxes at Shortcode, the characters you put in the After section are not reflected, instead the letters in the before text box are reflected in After. Waiting for correction with known facts already?
There are bugs in enqueue.php and media_button.js.
For enqueue.php, I think it is caused by After Text: input type = “text” id = “t20_sc_before_caption” name = “t20_sc_before_caption”.
The direction of media_button.js is
var after = $ (‘# t20 _ sc _before_caption’). val ();
I think this is the cause.