Invalid message not displaying

I have a small problem with entering an invalid domain name in unlimited domain check type. The invalid message show as usual when I first entering an invalid domain name, after that I entered a valid domain name and it also show a modal as usual. After that, everything started to go wrong. When I entered an invalid domain name, the plugin didn’t remove the div with id ‘dc-result-‘ of last result modal show it cannot do changes with div area with that id to show an invalid message. Can you modify that or instruct to modify that?