diff --git a/apps/web/src/store/index.ts b/apps/web/src/store/index.ts
index d362570..a01e8c4 100644
--- a/apps/web/src/store/index.ts
+++ b/apps/web/src/store/index.ts
@@ -1481,12 +1481,19 @@ export const useGameStore = create<Store>()(
             infraNav: { level: 'clusters' },
           } as unknown as Store;
         }
-        const s = _persisted as Record<string, unknown>;
-        const research = s.research as Record<string, unknown>;
-        if (!research.researchQueue) {
-          s.research = { ...research, researchQueue: [] };
+        return _persisted as Store;
+      },
+      merge: (persisted, current) => {
+        const p = persisted as Record<string, unknown>;
+        const c = current as unknown as Record<string, unknown>;
+        const merged = { ...c, ...p };
+        for (const key of Object.keys(c)) {
+          if (p[key] != null && typeof p[key] === 'object' && !Array.isArray(p[key])
+            && typeof c[key] === 'object' && !Array.isArray(c[key])) {
+            merged[key] = { ...c[key] as Record<string, unknown>, ...p[key] as Record<string, unknown> };
+          }
         }
-        return s as unknown as Store;
+        return merged as unknown as Store;
       },
     },
   ),