Adding onBlur breaks SideMenu customization

[khash]

Describe the bug If you implement this example in the docs (https://www.blocknotejs.org/docs/side-menu#custom-side-menu) to customize the side menu it works, until you add an onBlur event to the editor:

To Reproduce Just implement the above example, add and remove the onBlur event handler.

Misc

• Node version: 20.10
• Package manager: npm
• Browser: Chrome
• [ ] I'm a sponsor and would appreciate if you could look into this sooner than later 💖