Notes just deleted an important document via "undo"

I'm on latest RC. My notes folder is pointing to a directory with documents on an external storage . I opened a document via Notes app and was wondering why the undo arrow icon was highlighted, i thought maybe i pressed a key by accident and added a character somewhere, so i presssed the undo button, which cleared the entire content and there is no option to "redo".

This seems to be a visual bug in the Rich Text Editor only, if i switch to normal edit or preview mode, the content of the file is back. Switching back to rich text, the file is empty again.

Steps to reproduce

1. Open existing document in rich text editor
2. Press Undo button (which shouldn't be active since there were no changes in the first place)
3. Lose entire content, editor window is empty with no possibility to restore content

Button shouldn't be active, or at least give possibility to redo

Start by reproducing the issue in the rich text editor using the listed steps, then inspect the rich text editor's undo-state handling. Verify the editor's initial undo button state and confirm that pressing it cannot hide or clear existing document content; ensure the document remains recoverable, including through redo if supported.