diff --git a/addons/web/static/src/js/chrome/action_manager_act_window.js b/addons/web/static/src/js/chrome/action_manager_act_window.js
index 19cda7d3241..507d8a18217 100644
--- a/addons/web/static/src/js/chrome/action_manager_act_window.js
+++ b/addons/web/static/src/js/chrome/action_manager_act_window.js
@@ -86,7 +86,7 @@ ActionManager.include({
                     // jQuery's BBQ plugin does some parsing on values that are valid integers
                     // which means that if there's only one item, it will do parseInt() on it,
                     // otherwise it will keep the comma seperated list as string
-                    context.active_ids = state.active_ids.split(',').map(function (id) {
+                    context.active_ids = state.active_ids.toString().split(',').map(function (id) {
                         return parseInt(id, 10) || id;
                     });
                 } else if (state.active_id) {
diff --git a/addons/web/static/tests/chrome/action_manager_tests.js b/addons/web/static/tests/chrome/action_manager_tests.js
index af335509afa..1820685ecc8 100644
--- a/addons/web/static/tests/chrome/action_manager_tests.js
+++ b/addons/web/static/tests/chrome/action_manager_tests.js
@@ -1342,6 +1342,26 @@ QUnit.module('ActionManager', {
         actionManager.destroy();
     });
 
+    QUnit.test('state with integer active_ids should not crash', async function (assert) {
+        assert.expect(0);
+
+        var actionManager = await createActionManager({
+            actions: this.actions,
+            mockRPC: function (route, args) {
+                if (route === '/web/action/run') {
+                    return Promise.resolve();
+                }
+                return this._super.apply(this, arguments);
+            },
+        });
+        await actionManager.loadState({
+            action: 2,
+            active_ids: 3,
+        });
+
+        actionManager.destroy();
+    });
+
     QUnit.module('Concurrency management');
 
     QUnit.test('drop previous actions if possible', async function (assert) {