diff --git a/dashboards/tracker-web/src/app/api/fleet/[...path]/route.ts b/dashboards/tracker-web/src/app/api/fleet/[...path]/route.ts
index 8d6bc366..9237ccd3 100644
--- a/dashboards/tracker-web/src/app/api/fleet/[...path]/route.ts
+++ b/dashboards/tracker-web/src/app/api/fleet/[...path]/route.ts
@@ -18,7 +18,7 @@ async function proxy(req: NextRequest, { params }: { params: Promise<{ path: str
   });
 
   try {
-    const headers: Record<string, string> = { 'Content-Type': 'application/json' };
+    const headers: Record<string, string> = {};
     const auth = req.headers.get('authorization');
     if (auth) headers['Authorization'] = auth;
 
@@ -37,7 +37,13 @@ async function proxy(req: NextRequest, { params }: { params: Promise<{ path: str
 
     if (req.method !== 'GET' && req.method !== 'HEAD') {
       const body = await req.text();
-      if (body) fetchOptions.body = body;
+      if (body) {
+        fetchOptions.body = body;
+        // Only declare a JSON body when there actually is one — bodyless POSTs
+        // (operator actions: ship/requeue/cancel) must NOT send Content-Type, or
+        // the backend rejects them with FST_ERR_CTP_EMPTY_JSON_BODY.
+        headers['Content-Type'] = 'application/json';
+      }
     }
 
     const res = await fetch(url.toString(), fetchOptions);