Fixed paste event handling in non-selectable blocks (#1094)

Author: matthewlipski

packages/core/src/schema/blocks/createSpec.ts

@@ -68,7 +68,11 @@ export type CustomBlockImplementation<
 export function applyNonSelectableBlockFix(nodeView: NodeView, editor: Editor) {
   nodeView.stopEvent = (event) => {
     // Ensures copy events are handled by the browser and not by ProseMirror.
-    if (event.type === "copy" || event.type === "cut") {
+    if (
+      event.type === "copy" ||
+      event.type === "cut" ||
+      event.type === "paste"
+    ) {
       return true;
     }
     // Blurs the editor on mouse down as the block is non-selectable. This is