As you can see, I got a crash flash when I typing the first character… but if there are contents inside a paragraph block, my input method just work as expected…
does this also occur without Yjs? I.e. can you add a ProseMirror widget to the last position of the document and reproduce the issue? y-prosemirror only interacts with ProseMirror through the ProseMirror API. The y-prosemirror cursor plugin simply adds a widget to the ProseMirror editor.