fix

wax-prosemirror-components/src/components/Button.js

@@ -20,7 +20,7 @@ const Button = ({ view = {}, item }) => {
 
   const handleMouseDown = (e, editorState, editorDispatch) => {
     e.preventDefault();
-    run(editorState, dispatch);
+    run(editorState, editorDispatch);
   };
 
   const isActive = !!(

wax-prosemirror-services/src/MultipleChoiceQuestionService/components/QuestionEditorComponent.js

@@ -113,14 +113,16 @@ const QuestionEditorComponent = ({ node, view, getPos }) => {
         disallowedTools: ['MultipleChoice'],
         handleDOMEvents: {
           mousedown: () => {
-            context.view.main.dispatch(
-              context.view.main.state.tr.setSelection(
-                new TextSelection(
-                  context.view.main.state.tr.doc.resolve(getPos() + 2),
+            context.updateView({}, questionId);
+            context.view[context.activeViewId].dispatch(
+              context.view[context.activeViewId].state.tr.setSelection(
+                TextSelection.between(
+                  context.view[context.activeViewId].state.selection.$anchor,
+                  context.view[context.activeViewId].state.selection.$head,
                 ),
               ),
             );
-            context.updateView({}, questionId);
+
             // Kludge to prevent issues due to the fact that the whole
             // footnote is node-selected (and thus DOM-selected) when
             // the parent editor is focused.