diff --git a/clustertool/embed/generic/kubernetes/networking/nginx-external/app/helm-release.yaml b/clustertool/embed/generic/kubernetes/networking/nginx-external/app/helm-release.yaml
index 34e9c226e92..c6089990c29 100644
--- a/clustertool/embed/generic/kubernetes/networking/nginx-external/app/helm-release.yaml
+++ b/clustertool/embed/generic/kubernetes/networking/nginx-external/app/helm-release.yaml
@@ -60,6 +60,7 @@ spec:
         keep-alive: 120
         proxy-body-size: 0
         proxy-buffer-size: 16k
+        proxy-busy-buffers-size: 32k
         ssl-protocols: TLSv1.3 TLSv1.2
         use-forwarded-headers: "true"
       metrics:
diff --git a/clustertool/embed/generic/kubernetes/networking/nginx-internal/app/helm-release.yaml b/clustertool/embed/generic/kubernetes/networking/nginx-internal/app/helm-release.yaml
index 2b380be47bb..c3cf4509f66 100644
--- a/clustertool/embed/generic/kubernetes/networking/nginx-internal/app/helm-release.yaml
+++ b/clustertool/embed/generic/kubernetes/networking/nginx-internal/app/helm-release.yaml
@@ -60,6 +60,7 @@ spec:
         keep-alive: 120
         proxy-body-size: 0
         proxy-buffer-size: 16k
+        proxy-busy-buffers-size: 32k
         ssl-protocols: TLSv1.3 TLSv1.2
         use-forwarded-headers: "true"
       metrics:
diff --git a/website/src/content/docs/guides/ingress/nginx.md b/website/src/content/docs/guides/ingress/nginx.md
index 036300cfdac..920b55b96f2 100644
--- a/website/src/content/docs/guides/ingress/nginx.md
+++ b/website/src/content/docs/guides/ingress/nginx.md
@@ -45,6 +45,7 @@ controller:
     keep-alive: 120
     proxy-body-size: 0
     proxy-buffer-size: 16k
+    proxy-busy-buffers-size: 32k
     ssl-protocols: TLSv1.3 TLSv1.2
     use-forwarded-headers: "true"
   metrics:
@@ -96,6 +97,7 @@ controller:
     keep-alive: 120
     proxy-body-size: 0
     proxy-buffer-size: 16k
+    proxy-busy-buffers-size: 32k
     ssl-protocols: TLSv1.3 TLSv1.2
     use-forwarded-headers: "true"
   metrics: