After upgrading 0.13.13, it is not possible to drag notes to other notes.
I don’t understand you. It works for me.
What exactly is your problem?
It might be an issue with the Excalidraw plugin if that’s installed. For me, disabling the plugin made drag-and-drop work as expected.
There’s a bug report on the excalidraw plugin repo Cannot Drag and Drop Images · Issue #304 · zsviczian/obsidian-excalidraw-plugin · GitHub