diff --git a/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx b/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx
index 078db6f7..057f4e52 100644
--- a/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx
+++ b/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx
@@ -198,6 +198,35 @@ function WebhookUrlField({
   );
 }
 
+// Hover-only Radix tooltips never open on touch devices (no pointer hover),
+// so the ``disabled_tooltip`` explaining why a field is locked was invisible on
+// mobile. This wrapper makes the info icon also toggle the tooltip on tap while
+// keeping hover behavior on desktop.
+function DisabledTooltipIcon({ text }: { text: string }) {
+  const [open, setOpen] = useState(false);
+  return (
+    <TooltipProvider delayDuration={100}>
+      <Tooltip open={open} onOpenChange={setOpen}>
+        <TooltipTrigger asChild>
+          <button
+            type="button"
+            aria-label={text}
+            className="inline-flex shrink-0"
+            onClick={(e) => {
+              e.preventDefault();
+              e.stopPropagation();
+              setOpen((v) => !v);
+            }}
+          >
+            <Info className="h-3.5 w-3.5 text-muted-foreground cursor-help shrink-0" />
+          </button>
+        </TooltipTrigger>
+        <TooltipContent className="max-w-xs">{text}</TooltipContent>
+      </Tooltip>
+    </TooltipProvider>
+  );
+}
+
 export default function DynamicFormComponent({
   itemConfigList,
   onSubmit,
@@ -550,18 +579,7 @@ export default function DynamicFormComponent({
               ? extractI18nObject(config.disabled_tooltip)
               : '';
           const renderDisabledTooltipIcon = () =>
-            disabledTooltip ? (
-              <TooltipProvider delayDuration={100}>
-                <Tooltip>
-                  <TooltipTrigger asChild>
-                    <Info className="h-3.5 w-3.5 text-muted-foreground cursor-help shrink-0" />
-                  </TooltipTrigger>
-                  <TooltipContent className="max-w-xs">
-                    {disabledTooltip}
-                  </TooltipContent>
-                </Tooltip>
-              </TooltipProvider>
-            ) : null;
+            disabledTooltip ? <DisabledTooltipIcon text={disabledTooltip} /> : null;
 
           // Webhook URL fields are display-only; render outside of form binding
           if (config.type === 'webhook-url') {
diff --git a/web/src/app/home/pipelines/components/pipeline-form/PipelineFormComponent.tsx b/web/src/app/home/pipelines/components/pipeline-form/PipelineFormComponent.tsx
index fc0a6812..863c2202 100644
--- a/web/src/app/home/pipelines/components/pipeline-form/PipelineFormComponent.tsx
+++ b/web/src/app/home/pipelines/components/pipeline-form/PipelineFormComponent.tsx
@@ -427,8 +427,9 @@ export default function PipelineFormComponent({
     //   1. Box sandbox is unavailable, or
     //   2. the deployment pins all pipelines to a fixed scope via
     //      ``system.limitation.force_box_session_id_template`` (SaaS).
-    const boxScopeForced =
-      !!systemInfo.limitation?.force_box_session_id_template;
+    const forcedBoxTemplate =
+      systemInfo.limitation?.force_box_session_id_template || '';
+    const boxScopeForced = !!forcedBoxTemplate;
     const stageSystemContext =
       stage.name === 'local-agent'
         ? {
@@ -437,6 +438,24 @@ export default function PipelineFormComponent({
           }
         : undefined;
 
+    // When the deployment pins every pipeline to a fixed sandbox scope (SaaS
+    // ``force_box_session_id_template``), the Sandbox Scope selector is locked.
+    // The runtime already overrides the scope on every exec, but the stored
+    // pipeline value can be anything (e.g. the per-chat default), which would
+    // make the locked selector display a scope that is NOT the one actually in
+    // effect. Coerce the displayed/saved value to the forced template so the UI
+    // truthfully reflects runtime behavior.
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const stageInitialValues: Record<string, any> =
+      (form.watch(formName) as Record<string, any>)?.[stage.name] || {};
+    const effectiveInitialValues =
+      stage.name === 'local-agent' && boxScopeForced
+        ? {
+            ...stageInitialValues,
+            'box-session-id-template': forcedBoxTemplate,
+          }
+        : stageInitialValues;
+
     return (
       <Card key={stage.name}>
         <CardHeader>
@@ -450,10 +469,7 @@ export default function PipelineFormComponent({
         <CardContent className="space-y-6">
           <DynamicFormComponent
             itemConfigList={stage.config}
-            initialValues={
-              // eslint-disable-next-line @typescript-eslint/no-explicit-any
-              (form.watch(formName) as Record<string, any>)?.[stage.name] || {}
-            }
+            initialValues={effectiveInitialValues}
             onSubmit={(values) => {
               handleDynamicFormEmit(formName, stage.name, values);
             }}