I accidentally misclicked and switched a note I have to Kanban view (I wanted a different view). On choosing another note view, I noticed all non-heading contents were erased from the note.
Fortunately, Standard Notes keeps track of note history, so I was able to get my note back. However, it was scary for a moment before I discovered the history feature.
It'd be good if the extension simply ignored irrelevant note content rather than deleting it. Or if it at least warned before deleting content.