Next.js problem while writing an article

Hello, I've added code from https://github.com/uiwjs/react-md-editor?tab=readme-ov-file#support-nextjs on my open-source website, but it doesn't work correctly. I have the strange blue line on the left side, and it's interferes with writing text further down the markdown.

My code here https://github.com/BadmWe/dspyt-webpage/blob/eb597c6452f9d9a9304f1f6fc4b1962c6c9680e1/dspyt/pages/markdown/index.js#L6-L74

When I try to write a text further, I have this problem

Actually, I tried to look at your finished code here

https://codesandbox.io/embed/nextjs-example-react-md-editor-https-github-com-uiwjs-react-md-editor-issues-516-1z56px?fontsize=14&hidenavigation=1&theme=dark

But it doesn't work

I have read through https://github.com/uiwjs/react-md-editor/issues/52
and think that

const MDEditor = dynamic(
  () => import("@uiw/react-md-editor"),
  { ssr: false }
);

messes up css

Start with dspyt/pages/markdown/index.js lines 6-74 and reproduce the editor behavior using the linked Next.js CodeSandbox. Compare that setup with the Next.js support example and issue #52, focusing on the reported blue line, CSS behavior, and text entry below it. Done means the editor renders without the unwanted line and accepts text correctly further down the document.