wordpress plugin fix

Hi, I have a custom plugin that was developed for my business. The plugin uses google maps and allows the business owner draw areas on the map and define shipping zones out of them. On the front end the customer can type in their address and see how much shipping will cost for a product based on the drawn zones. The plugin works fine but in the placeholder where you type in the address it is showing random code. Also the placeholder where it displays shipping price is displaying random code. If you delete the code and type in the address you can see that the plugin is working ok. Here is a video and a screenshot