diff --git a/renderer/app.js b/renderer/app.js
index e63f596..d28c0cd 100644
--- a/renderer/app.js
+++ b/renderer/app.js
@@ -2522,8 +2522,10 @@ async function executeHealthCheck(hosters, _mode) {
 }
 
 async function runHealthCheck(mode = 'manual', requestedHosters = null) {
-  if (healthCheckRunning || (uploading && mode === 'manual')) return [];
-  // Build check list: all enabled accounts with creds
+  if (healthCheckRunning) {
+    if (mode === 'manual') showCopyToast('Account-Check läuft bereits.');
+    return [];
+  }
   let hosters;
   if (Array.isArray(requestedHosters) && requestedHosters.length > 0) {
     hosters = requestedHosters;