Welcome to the Developer Forum – it is a pleasure to have you. Thanks for verifying that you’ve already implemented Chrome Origin Trails. Based on the screenshot, I noticed the application is being served over HTTP. As a test, can you sever your site over HTTPS and let us know if the behavior persists? You can quickly enable a locally running server with a tool like Ngrok, which allows you to tunnel traffic to your server running on localhost through an HTTPS domain.
I added below styles in html to get dropdown now dropdown working
<link type="text/css" rel="stylesheet" href="https://source.zoom.us/2.1.1/css/bootstrap.css" />
<link type="text/css" rel="stylesheet" href="https://source.zoom.us/2.1.1/css/react-select.css" />