diff --git a/renderer/app.js b/renderer/app.js
index 4e2ade4..358b3ba 100644
--- a/renderer/app.js
+++ b/renderer/app.js
@@ -1315,7 +1315,7 @@ function getSelectedJobLinks() {
 async function startUpload() {
   if (uploading) return;
   // Wait for any running health check to finish (e.g. startup auto-check)
-  while (healthCheckRunning) await new Promise(r => setTimeout(r, 100));
+  for (let _hcWait = 0; healthCheckRunning && _hcWait < 300; _hcWait++) await new Promise(r => setTimeout(r, 100)); // max 30s
   uploading = true; // set immediately to prevent double-click race
   updateQueueActionButtons();
 
@@ -1386,7 +1386,7 @@ async function startUpload() {
 
 async function startSelectedUpload() {
   if (uploading) return;
-  while (healthCheckRunning) await new Promise(r => setTimeout(r, 100));
+  for (let _hcWait = 0; healthCheckRunning && _hcWait < 300; _hcWait++) await new Promise(r => setTimeout(r, 100)); // max 30s
   uploading = true; // set immediately to prevent double-click race
   updateQueueActionButtons();
 
@@ -1567,6 +1567,7 @@ function handleProgress(data) {
 function handleBatchDone(summary) {
   uploading = false;
   applySummaryResults(summary);
+  _deletedJobIds.clear(); // Free memory — stale IDs no longer needed after batch completes
 
   // Reset aborted jobs back to queued so they can be restarted
   for (const job of queueJobs) {