diff --git a/src/stores/questions.ts b/src/stores/questions.ts
index c5b3ebea..26d0f611 100644
--- a/src/stores/questions.ts
+++ b/src/stores/questions.ts
@@ -24,6 +24,10 @@ import { QUIZ_QUESTION_SELECT } from "../constants/select";
 import { QUIZ_QUESTION_TEXT } from "../constants/text";
 import { QUIZ_QUESTION_VARIANT } from "../constants/variant";
 import { QUIZ_QUESTION_VARIMG } from "../constants/varimg";
+import { setAutoFreeze } from "immer";
+
+
+setAutoFreeze(false);
 
 interface QuestionStore {
   listQuestions: Record<string, AnyQuizQuestion[]>;
@@ -59,6 +63,37 @@ export const questionStore = create<QuestionStore>()(
 
         return state;
       },
+        merge: (persistedState, currentState) => {
+            const state = persistedState as QuestionStore;
+
+            // replace blob urls with ""
+            Object.values(state.listQuestions).forEach(questions => {
+                questions.forEach(question => {
+                    if (question.type === "page" && question.content.picture.startsWith("blob:")) {
+                        question.content.picture = "";
+                    }
+                    if (question.type === "images") {
+                        question.content.variants.forEach(variant => {
+                            if (variant.extendedText.startsWith("blob:")) {
+                                variant.extendedText = "";
+                            }
+                        });
+                    }
+                    if (question.type === "varimg") {
+                        question.content.variants.forEach(variant => {
+                            if (variant.extendedText.startsWith("blob:")) {
+                                variant.extendedText = "";
+                            }
+                        });
+                    }
+                });
+            });
+
+            return {
+                ...currentState,
+                ...state,
+            };
+        },
     }
   )
 );