diff --git a/lib/upload-manager.js b/lib/upload-manager.js
index 0068dc7..b92d2f7 100644
--- a/lib/upload-manager.js
+++ b/lib/upload-manager.js
@@ -698,13 +698,18 @@ class UploadManager extends EventEmitter {
   }
 
   addJobs(tasks) {
-    if (!this.running || !tasks || tasks.length === 0) return 0;
+    if (!this.running || !tasks || tasks.length === 0) {
+      return { added: 0, alreadyInBatchJobIds: [] };
+    }
     const { signal } = this.abortController;
     const results = this._batchResults || new Map();
-    let added = 0;
+    const addResult = { added: 0, alreadyInBatchJobIds: [] };
     for (const task of tasks) {
       // Skip if this job is already being processed (prevent duplicates)
-      if (task.jobId && this.jobAbortControllers.has(task.jobId)) continue;
+      if (task.jobId && this.jobAbortControllers.has(task.jobId)) {
+        addResult.alreadyInBatchJobIds.push(task.jobId);
+        continue;
+      }
       const fileName = path.basename(task.file);
       if (!results.has(task.file)) {
         let size = 0;
@@ -712,9 +717,9 @@ class UploadManager extends EventEmitter {
         results.set(task.file, { name: fileName, size, results: [] });
       }
       this._additionalPromises.push(this._runJob(task, results, signal));
-      added++;
+      addResult.added++;
     }
-    return added;
+    return addResult;
   }
 
   cancelJobs(jobIds) {
diff --git a/main.js b/main.js
index f758bc9..4db690d 100644
--- a/main.js
+++ b/main.js
@@ -785,10 +785,26 @@ ipcMain.handle('add-jobs-to-batch', (_event, payload) => {
   const config = configStore.load();
   const jobs = payload && Array.isArray(payload.jobs) ? payload.jobs : [];
   const tasks = buildUploadTasksFromJobs(config, jobs);
-  if (tasks.length === 0) return { added: 0 };
-  const added = uploadManager.addJobs(tasks);
-  debugLog(`add-jobs-to-batch: ${added} of ${tasks.length} tasks added (${tasks.length - added} already in batch)`);
-  return { added };
+  const taskJobIds = new Set(tasks.map(t => t.jobId).filter(Boolean));
+  const skippedJobs = jobs
+    .filter(j => j && j.id && !taskJobIds.has(j.id))
+    .map(j => ({ jobId: j.id, hoster: j.hoster, reason: 'Kein gültiger Account für diesen Hoster' }));
+
+  if (tasks.length === 0) {
+    debugLog(`add-jobs-to-batch: 0 tasks built (${skippedJobs.length} skipped: no account)`);
+    return { added: 0, skippedJobs, alreadyInBatchJobIds: [] };
+  }
+
+  const addResult = uploadManager.addJobs(tasks);
+  const added = typeof addResult === 'number' ? addResult : (addResult && addResult.added) || 0;
+  const alreadyInBatchJobIds = (addResult && Array.isArray(addResult.alreadyInBatchJobIds))
+    ? addResult.alreadyInBatchJobIds
+    : [];
+
+  debugLog(
+    `add-jobs-to-batch: ${added} of ${tasks.length} tasks added (${alreadyInBatchJobIds.length} already in batch, ${skippedJobs.length} skipped)`
+  );
+  return { added, skippedJobs, alreadyInBatchJobIds };
 });
 
 ipcMain.handle('finish-after-active', () => {
diff --git a/renderer/app.js b/renderer/app.js
index ca91688..2fb555a 100644
--- a/renderer/app.js
+++ b/renderer/app.js
@@ -1363,20 +1363,44 @@ async function startSelectedUpload() {
         j.bytesUploaded = 0; j.speedKbs = 0; j.progress = 0; j.uploadId = null;
       });
       renderQueueTable();
-      const result = await window.api.addJobsToBatch({
-        jobs: addable.map(j => ({ id: j.id, file: j.file, fileName: j.fileName, hoster: j.hoster }))
-      });
+      let result = null;
+      try {
+        result = await window.api.addJobsToBatch({
+          jobs: addable.map(j => ({ id: j.id, file: j.file, fileName: j.fileName, hoster: j.hoster }))
+        });
+      } catch (err) {
+        showCopyToast(`Jobs konnten nicht hinzugefuegt werden: ${err.message}`);
+        return;
+      }
+
+      // If the batch ended between UI-state and IPC call, start a fresh batch immediately
+      if (result && result.error === 'Kein Upload aktiv') {
+        uploading = false;
+        updateQueueActionButtons();
+        updateStatusBar();
+        await startSelectedUpload();
+        return;
+      }
       _markSkippedJobs(result);
       persistQueueStateSoon();
-      const added = result && result.added || 0;
-      const alreadyInBatch = addable.length - added;
-      if (added > 0 && alreadyInBatch > 0) {
-        showCopyToast(`${added} Jobs hinzugefügt, ${alreadyInBatch} waren schon im Batch`);
-      } else if (added > 0) {
-        showCopyToast(`${added} Jobs zum laufenden Upload hinzugefügt`);
+      const added = Number(result && result.added) || 0;
+      // Use ASCII-only toast text here to avoid encoding artifacts on some systems.
+      const skipped = Array.isArray(result && result.skippedJobs) ? result.skippedJobs.length : 0;
+      const alreadyInBatch = Array.isArray(result && result.alreadyInBatchJobIds)
+        ? result.alreadyInBatchJobIds.length
+        : Math.max(0, addable.length - added - skipped);
+      const toastParts = [];
+      if (added > 0) toastParts.push(`${added} hinzugefuegt`);
+      if (alreadyInBatch > 0) toastParts.push(`${alreadyInBatch} bereits im Batch`);
+      if (skipped > 0) toastParts.push(`${skipped} ohne gueltigen Account`);
+      if (result && result.error) {
+        showCopyToast(`Jobs konnten nicht hinzugefuegt werden: ${result.error}`);
+      } else if (toastParts.length > 0) {
+        showCopyToast(`Jobs: ${toastParts.join(', ')}`);
       } else {
-        showCopyToast(`${addable.length} Jobs sind bereits im laufenden Batch`);
+        showCopyToast('Keine Jobs hinzugefuegt');
       }
+      return;
     }
     return;
   }
diff --git a/tests/upload-manager.test.js b/tests/upload-manager.test.js
index 3b2717f..da57c56 100644
--- a/tests/upload-manager.test.js
+++ b/tests/upload-manager.test.js
@@ -242,6 +242,55 @@ describe('UploadManager', () => {
     assert.ok(statuses.some((entry) => entry.jobId === 'selected-job' && entry.status === 'aborted'));
   });
 
+  it('addJobs returns duplicate info and still runs newly queued jobs', async () => {
+    let releaseFirst = null;
+
+    mockUploadFile.mock.mockImplementation(async (hoster, filePath, apiKey, onProgress, signal) => {
+      if (filePath.endsWith('/first.mp4')) {
+        await new Promise((resolve, reject) => {
+          releaseFirst = resolve;
+          if (signal) {
+            signal.addEventListener('abort', () => reject(new Error('Aborted')), { once: true });
+          }
+        });
+      } else {
+        await new Promise((resolve) => setTimeout(resolve, 20));
+      }
+      if (onProgress) onProgress(fakeFileSize, fakeFileSize);
+      return { download_url: 'https://test/ok', embed_url: null, file_code: 'ok' };
+    });
+
+    const mgr = new UploadManager({
+      'doodstream.com': { retries: 0, parallelCount: 1, maxSpeedKbs: 0, restartBelowKbs: 0, timeIntervalSec: 0, maxSizeMb: 0 }
+    });
+    const statuses = [];
+    mgr.on('progress', (data) => statuses.push({ jobId: data.jobId, status: data.status }));
+
+    const batchPromise = mgr.startBatch([
+      { jobId: 'job-first', file: '/test/first.mp4', hoster: 'doodstream.com', apiKey: 'key1' }
+    ]);
+
+    for (let i = 0; i < 50 && !releaseFirst; i++) {
+      await new Promise((resolve) => setTimeout(resolve, 10));
+    }
+    assert.equal(typeof releaseFirst, 'function', 'first job should be running before addJobs');
+
+    const addResult = mgr.addJobs([
+      { jobId: 'job-first', file: '/test/first.mp4', hoster: 'doodstream.com', apiKey: 'key1' },
+      { jobId: 'job-second', file: '/test/second.mp4', hoster: 'doodstream.com', apiKey: 'key1' },
+      { jobId: 'job-third', file: '/test/third.mp4', hoster: 'doodstream.com', apiKey: 'key1' }
+    ]);
+
+    assert.equal(addResult.added, 2);
+    assert.deepEqual(addResult.alreadyInBatchJobIds, ['job-first']);
+
+    releaseFirst();
+    await batchPromise;
+
+    assert.ok(statuses.some((entry) => entry.jobId === 'job-second' && entry.status === 'done'));
+    assert.ok(statuses.some((entry) => entry.jobId === 'job-third' && entry.status === 'done'));
+  });
+
   it('_combineSignals propagates abort from either source', () => {
     const mgr = new UploadManager({});
     const ac1 = new AbortController();