diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 2f3a56f2a..33cbf15e6 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -1500,9 +1500,12 @@ export async function POST(request: NextRequest) {
           resolvedScaleAdjustModelEntry?.provider?.type === "fal-image",
         scaleAdjustProviderFallbackPolicy: isScaleAdjustOperation
           ? scaleAdjustModelFamily
-            ? "same-name-low-cost-first-fal-last"
+            ? "same-name-service-error-only-fal-last"
             : "default-model-failover"
           : undefined,
+        scaleAdjustQualityFailoverPolicy: isScaleAdjustOperation
+          ? "disabled-return-first-ai-candidate"
+          : undefined,
         scaleAdjustPreferSameNameProviderFailover:
           isScaleAdjustOperation && Boolean(scaleAdjustModelFamily),
         scaleAdjustStrictSameFamilyFailover:
diff --git a/lib/canvas/generate-image.ts b/lib/canvas/generate-image.ts
index 1e4ffb1b1..6709efd5c 100644
--- a/lib/canvas/generate-image.ts
+++ b/lib/canvas/generate-image.ts
@@ -156,7 +156,7 @@ const LOCAL_EDIT_COMPOSITE_FEATHER_MAX_PX = 72;
 const LOCAL_EDIT_COMPOSITE_FEATHER_RATIO = 0.018;
 const LOCAL_EDIT_COMPOSITE_DIFF_LOW_THRESHOLD = 10;
 const LOCAL_EDIT_COMPOSITE_DIFF_HIGH_THRESHOLD = 34;
-const SCALE_ADJUST_VISUAL_DIFF_THRESHOLD = 14;
+const SCALE_ADJUST_VISUAL_DIFF_THRESHOLD = 10;
 const SCALE_ADJUST_OUTSIDE_DIFF_THRESHOLD = 18;
 const SCALE_ADJUST_OUTSIDE_DIFF_MIN_CHANGED_RATIO = 0.28;
 const SCALE_ADJUST_OUTSIDE_PIXEL_DIFF_THRESHOLD = 16;
@@ -2630,9 +2630,9 @@ export async function generateCanvasImage(
   const allowFailover = request.allowFailover !== false;
   const shouldFailover =
     shouldFailoverAiModelError(caughtError) ||
-    (scaleAdjustRejected &&
-      Boolean(debugMeta?.scaleAdjustPreferSameNameProviderFailover)) ||
-    (Boolean(debugMeta?.detailFixedModelApplied) && Boolean(caughtError));
+    (!scaleAdjustRejected &&
+      Boolean(debugMeta?.detailFixedModelApplied) &&
+      Boolean(caughtError));
   const fallbackModel = allowFailover && shouldFailover
     ? findCanvasFailoverModel({
         selectedModel,