diff --git a/packages/system/linstor-gui/templates/configmap-nginx.yaml b/packages/system/linstor-gui/templates/configmap-nginx.yaml
index e7ba02bd..0ba8e4fe 100644
--- a/packages/system/linstor-gui/templates/configmap-nginx.yaml
+++ b/packages/system/linstor-gui/templates/configmap-nginx.yaml
@@ -71,8 +71,11 @@ data:
 
         location = /healthz {
           access_log off;
+          # default_type must come BEFORE `return` — `add_header` after a
+          # `return` is silently dropped by nginx because the response is
+          # already finalized.
+          default_type text/plain;
           return 200 'ok';
-          add_header Content-Type text/plain;
         }
       }
     }
diff --git a/packages/system/linstor-gui/templates/deployment.yaml b/packages/system/linstor-gui/templates/deployment.yaml
index 838e87bd..92e2f7a6 100644
--- a/packages/system/linstor-gui/templates/deployment.yaml
+++ b/packages/system/linstor-gui/templates/deployment.yaml
@@ -18,8 +18,6 @@ spec:
       maxSurge: 1
   template:
     metadata:
-      annotations:
-        checksum/nginx-config: {{ include (print $.Template.BasePath "/configmap-nginx.yaml") . | sha256sum }}
       labels:
         {{- include "linstor-gui.labels" . | nindent 8 }}
     spec: