diff --git a/server/services/DownloadMatcher.js b/server/services/DownloadMatcher.js
index 09c719a..3aaf259 100644
--- a/server/services/DownloadMatcher.js
+++ b/server/services/DownloadMatcher.js
@@ -290,7 +290,7 @@ async function matchSabSlots(slots, context) {
 
   const matched = [];
   for (const slot of slots) {
-    const nzbName = slot.filename || slot.nzbname;
+    const nzbName = slot.filename || slot.nzbname || slot.name || slot.nzb_name;
     if (!nzbName) continue;
 
     const slotState = getSlotStatusAndSpeed(slot, queueStatus, queueSpeed, queueKbpersec);
@@ -347,7 +347,7 @@ async function matchSabHistory(slots, context) {
   const matched = [];
 
   for (const slot of slots) {
-    const nzbName = slot.name || slot.nzb_name || slot.nzbname;
+    const nzbName = slot.filename || slot.nzbname || slot.name || slot.nzb_name;
     if (!nzbName) continue;
 
     const sabDownloadId = slot.nzo_id || slot.id;
diff --git a/tests/unit/services/DownloadMatcher.test.js b/tests/unit/services/DownloadMatcher.test.js
index 038470e..4d20705 100644
--- a/tests/unit/services/DownloadMatcher.test.js
+++ b/tests/unit/services/DownloadMatcher.test.js
@@ -263,6 +263,24 @@ describe('DownloadMatcher', () => {
       expect(result[0].arrQueueId).toBe(301);
       expect(result[0].arrType).toBe('radarr');
     });
+
+    it('matches when history slots only have the filename field (cached legacy format)', async () => {
+      const testContext = {
+        ...context,
+        sonarrHistoryRecords: [],
+        sonarrQueueRecords: [
+          { id: 201, seriesId: 1, title: 'My.Cool.Show.S01E01.720p-Group' }
+        ],
+        seriesMap: new Map([[1, { id: 1, title: 'My Cool Show', tags: [1] }]])
+      };
+
+      const slots = [{ id: null, filename: 'My_Cool_Show_S01E01_720p-Group.nzb', status: 'Completed', mb: 1000 }];
+      const result = await DownloadMatcher.matchSabHistory(slots, testContext);
+
+      expect(result).toHaveLength(1);
+      expect(result[0].arrQueueId).toBe(201);
+      expect(result[0].arrType).toBe('sonarr');
+    });
   });
 
   describe('titleMatches helper', () => {