we want to morph text and comment nodes too, not just element nodes.

src/core/morphing.js

@@ -9,7 +9,7 @@ export function morphElements(currentElement, newElement, { callbacks, ...option
 }
 
 export function morphChildren(currentElement, newElement) {
-  morphElements(currentElement, newElement.children, {
+  morphElements(currentElement, newElement.childNodes, {
     morphStyle: "innerHTML"
   })
 }