Using `editor.updateBlock` while changing the content of the block deletes the children

[mfanselmo]

Describe the bug

When using the editor API editor.updateBlock and changing the block's content, the children are removed. I think this is unexpected behavior but please let me know if there is a reason for this, I have not looked very into detail in the code

To Reproduce

Screen.Recording.2024-09-24.at.1.49.47.PM.mov

https://stackblitz.com/edit/github-7jn7g7?file=SideMenuItems.tsx

[matthewlipski]

Nice find! Fortunately it's a one line fix (passing content replaces the content of the whole block including children). Will make a PR shortly👍