fix: filter virtualMerge keys only if its a store

src/renderer/util.ts

@@ -1,4 +1,4 @@
-import { React, channels, fluxDispatcher, guilds } from "@common";
+import { React, channels, flux, fluxDispatcher, guilds } from "@common";
 import type { Fiber } from "react-reconciler";
 import type { Jsonifiable } from "type-fest";
 import type { ObjectExports } from "../types";
@@ -292,7 +292,9 @@ export function virtualMerge<O extends ObjectType[]>(...objects: O): ExtractObje
             // Manually iterate over the property names of the object because the spread operator does not work with prototype objects, which are common for stores.
             Object.getOwnPropertyNames(obj).forEach((key) => {
               // Filter out keys that are common on all stores
-              if (key !== "initialize" && key !== "constructor") acc[key] = obj[key];
+              if (!(obj instanceof flux.Store) || (key !== "initialize" && key !== "constructor")) {
+                acc[key] = obj[key];
+              }
             });
             return acc;
           }, {});