diff --git a/.github/workflows/build-test-publish.yaml b/.github/workflows/build-test-publish.yaml
index d2b2c9a5..ae5dc68b 100644
--- a/.github/workflows/build-test-publish.yaml
+++ b/.github/workflows/build-test-publish.yaml
@@ -48,7 +48,7 @@ jobs:
         run: yarn build
 
       - name: Cache build
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-build
         id: cache-build
@@ -56,7 +56,7 @@ jobs:
           path: ./*
           key: ${{ github.sha }}
       - name: Cache cypress
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-cypress
         id: cache-cypress
@@ -75,7 +75,7 @@ jobs:
         with:
           node-version: 14
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-build
         with:
           path: ./*
@@ -94,7 +94,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: "14"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-build
         with:
           path: ./*
@@ -112,7 +112,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: "14"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-build
         with:
           path: ./*
@@ -128,12 +128,12 @@ jobs:
         containers: [1, 2, 3, 4, 5, 6, 7]
     needs: ["build", "prepare"]
     steps:
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-build
         with:
           path: ./*
           key: ${{ github.sha }}
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-cypress
         with:
           path: /home/runner/.cache/Cypress/*
@@ -168,7 +168,7 @@ jobs:
           node-version: 14
           registry-url: "https://registry.yarnpkg.com/"
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         id: restore-build
         with:
           path: ./*
diff --git a/commons/src/store/manifest.ts b/commons/src/store/manifest.ts
index 8eaf6827..c2d2a990 100644
--- a/commons/src/store/manifest.ts
+++ b/commons/src/store/manifest.ts
@@ -36,3 +36,18 @@ function initialize(): Writable<ManifestStore> {
 }
 
 export const ManifestStore = initialize();
+
+/**
+ * Invalidate a cached manifest entry so the next access triggers a fresh fetch.
+ * Call after saving a manifest to prevent stale data on re-mount.
+ */
+export function invalidateManifestCache(componentId: string, accessToken?: string): void {
+  const key = JSON.stringify({ component_id: componentId, access_token: accessToken });
+  ManifestStore.update((store) => {
+    // The store wraps a Proxy whose underlying target holds cached promises.
+    // Deleting the key from the store object causes the Proxy get-trap to
+    // re-fetch on the next access.
+    delete (store as Record<string, unknown>)[key];
+    return store;
+  });
+}
diff --git a/components/schedule-editor/src/ScheduleEditor.svelte b/components/schedule-editor/src/ScheduleEditor.svelte
index b904fad8..53901aab 100644
--- a/components/schedule-editor/src/ScheduleEditor.svelte
+++ b/components/schedule-editor/src/ScheduleEditor.svelte
@@ -20,6 +20,7 @@
   import { onDestroy, onMount, tick } from "svelte";
   import timezones from "timezones-list";
   import { ErrorStore, ManifestStore } from "@commons";
+  import { invalidateManifestCache } from "@commons/store/manifest";
   import { getEventDispatcher } from "@commons/methods/component";
   import { saveManifest } from "@commons/connections/manifest";
   import "../../availability/src/Availability.svelte";
@@ -201,7 +202,7 @@
   }
   // #endregion mount and prop initialization
 
-  function saveProperties() {
+  async function saveProperties() {
     const cleanedProps = {
       ..._this,
       custom_fields: _this.custom_fields.map((field) => {
@@ -210,7 +211,13 @@
       }),
     };
 
-    saveManifest(id, cleanedProps, access_token);
+    await saveManifest(id, cleanedProps, access_token);
+
+    // Invalidate the ManifestStore cache and update the local manifest so
+    // that both re-mounts and in-session reads reflect the saved state.
+    // Fixes CUST-5442: deleted custom fields reappearing after save.
+    invalidateManifestCache(id, access_token);
+    manifest = { ...cleanedProps };
   }
 
   // #region unpersisted variables