The text of an element disappears after a drag-and-drop in Drag and Drop

In "Drag and Drop" content, the text of a dragged element disappears completely once dropped into a drop zone—it’s not just visually hidden; the content actually appears empty (verified with Ctrl+A; no selection is possible there).

Steps to reproduce:

1. Create a new "Drag and Drop" content type with at least one text element and a drop zone

2. Drag the element into the drop zone

3. Notice that the text has disappeared, even though it was clearly visible before being dropped

Reproducible: Yes, even in a minimal test with only 2 elements

Browser: Chrome