CursorEditor sending cursor position not working

Hi! I am trying to clear a remote user's cursor position using CursorEditor.sendCursorPosition(editor, null). This is similar to the approach taken in useUnsetCursorPositionOnBlur (which also does not work). I am trying to remove a user's cursor if the slate editor is blurred. I see no errors or warnings in the console. It doesn't work. The problem, I think, lies in the sendCursorPosition function.