I translated a section, saved. I pressed undo. The section goes to placeholder.
I leave the translation and restore later.

Since the saving does not save placeholder, what is restored is my translation of section.

The expected result here is, restoring the placeholder.

We may need to have an API or some way to tell to delete a section from from the database when this happens. Restoring a placeholder to fix this will break so many assumptions about placeholders and sections.