No way to get to next line when doing ```[language] shortcut for codeblocks

• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• I have read the documentation and cannot find an answer.

Describe the bug
Testing in https://mdxeditor.dev/editor/demo go to the bottom of the page and write ```js followed by space. Now try to get to the next line to write in. (I would expect this to work with shift+enter or just clicking below it).

When using the code block button in the navbar it will add a newline below the codeblock to continue writing in.

Reproduction
Testing in https://mdxeditor.dev/editor/demo go to the bottom of the page and write ```js followed by space

To Reproduce
Steps to reproduce the behavior:

1. https://mdxeditor.dev/editor/demo
2. Click on the last editable part of the markdown editor
3. write ```js followed by enter
4. try to write after the codeblock

Expected behavior
Should be able to continue after writing a codeblock

Desktop (please complete the following information):

• OS: MacOs
• Chrome

Start at the MDXEditor demo entry point and reproduce the issue in Chrome on macOS by entering ```js at the bottom editable area and pressing Enter. Confirm that the code block shortcut leaves a usable place to continue editing after the block, matching the navbar code-block behavior.