diff --git a/Yattee/Helpers/ObjCExceptionHandler.h b/Yattee/Helpers/ObjCExceptionHandler.h
new file mode 100644
index 00000000..a4d201fe
--- /dev/null
+++ b/Yattee/Helpers/ObjCExceptionHandler.h
@@ -0,0 +1,17 @@
+//
+//  ObjCExceptionHandler.h
+//  Yattee
+//
+//  Catches ObjC NSExceptions that Swift cannot handle natively.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Executes a block and catches any NSException thrown.
+/// Returns YES if the block executed without throwing, NO if an exception was caught.
+/// If an exception is caught, it is returned via the outException parameter.
+BOOL tryCatchObjCException(void (NS_NOESCAPE ^block)(void), NSException *_Nullable *_Nullable outException);
+
+NS_ASSUME_NONNULL_END
diff --git a/Yattee/Helpers/ObjCExceptionHandler.m b/Yattee/Helpers/ObjCExceptionHandler.m
new file mode 100644
index 00000000..dac39604
--- /dev/null
+++ b/Yattee/Helpers/ObjCExceptionHandler.m
@@ -0,0 +1,20 @@
+//
+//  ObjCExceptionHandler.m
+//  Yattee
+//
+//  Catches ObjC NSExceptions that Swift cannot handle natively.
+//
+
+#import "ObjCExceptionHandler.h"
+
+BOOL tryCatchObjCException(void (NS_NOESCAPE ^block)(void), NSException *_Nullable *_Nullable outException) {
+    @try {
+        block();
+        return YES;
+    } @catch (NSException *exception) {
+        if (outException) {
+            *outException = exception;
+        }
+        return NO;
+    }
+}
diff --git a/Yattee/Services/Downloads/DownloadManager+Execution.swift b/Yattee/Services/Downloads/DownloadManager+Execution.swift
index 17644557..104e3498 100644
--- a/Yattee/Services/Downloads/DownloadManager+Execution.swift
+++ b/Yattee/Services/Downloads/DownloadManager+Execution.swift
@@ -99,10 +99,41 @@ extension DownloadManager {
         resumeData: Data?,
         httpHeaders: [String: String]? = nil
     ) {
+        guard urlSession != nil else {
+            LoggingService.shared.logDownloadError(
+                "[Downloads] URLSession is nil in startStreamDownload (\(phase))",
+                error: DownloadError.downloadFailed("URLSession not available - session may be invalidated")
+            )
+            handleDownloadError(
+                downloadID: downloadID,
+                phase: phase,
+                error: DownloadError.downloadFailed("URLSession not available")
+            )
+            return
+        }
+
         let task: URLSessionDownloadTask
 
         if let resumeData {
-            task = urlSession.downloadTask(withResumeData: resumeData)
+            var caughtException: NSException?
+            var resumeTask: URLSessionDownloadTask?
+            let success = tryCatchObjCException({
+                resumeTask = self.urlSession.downloadTask(withResumeData: resumeData)
+            }, &caughtException)
+
+            guard success, let resumeTask else {
+                LoggingService.shared.logDownloadError(
+                    "[Downloads] NSException creating resume task (\(phase))",
+                    error: DownloadError.downloadFailed("CFNetwork exception: \(caughtException?.reason ?? "unknown")")
+                )
+                handleDownloadError(
+                    downloadID: downloadID,
+                    phase: phase,
+                    error: DownloadError.downloadFailed("Failed to create download task: \(caughtException?.reason ?? "unknown")")
+                )
+                return
+            }
+            task = resumeTask
         } else {
             // Starting fresh without resumeData - reset progress for this phase
             // to avoid jumping when saved progress conflicts with new URLSession progress
@@ -128,7 +159,26 @@ extension DownloadManager {
                     request.setValue(value, forHTTPHeaderField: key)
                 }
             }
-            task = urlSession.downloadTask(with: request)
+
+            var caughtException: NSException?
+            var newTask: URLSessionDownloadTask?
+            let success = tryCatchObjCException({
+                newTask = self.urlSession.downloadTask(with: request)
+            }, &caughtException)
+
+            guard success, let newTask else {
+                LoggingService.shared.logDownloadError(
+                    "[Downloads] NSException creating download task (\(phase))",
+                    error: DownloadError.downloadFailed("CFNetwork exception: \(caughtException?.reason ?? "unknown")")
+                )
+                handleDownloadError(
+                    downloadID: downloadID,
+                    phase: phase,
+                    error: DownloadError.downloadFailed("Failed to create download task: \(caughtException?.reason ?? "unknown")")
+                )
+                return
+            }
+            task = newTask
         }
 
         task.taskDescription = "\(downloadID.uuidString):\(phase.rawValue)"
diff --git a/Yattee/Services/Downloads/DownloadManager.swift b/Yattee/Services/Downloads/DownloadManager.swift
index 634fa34b..b49aed0d 100644
--- a/Yattee/Services/Downloads/DownloadManager.swift
+++ b/Yattee/Services/Downloads/DownloadManager.swift
@@ -148,8 +148,9 @@ final class DownloadManager: NSObject {
         self.downloadSettings = settings
         // Invalidate old session before creating new one with correct settings
         urlSession?.invalidateAndCancel()
+        urlSession = nil
         setupSession()
-        
+
         // Resume interrupted downloads only on initial setup
         if isInitialSetup {
             resumeInterruptedDownloads()
@@ -186,8 +187,9 @@ final class DownloadManager: NSObject {
             }
         }
 
-        // 3. Invalidate the old session
-        urlSession.invalidateAndCancel()
+        // 3. Invalidate the old session (use finishTasksAndInvalidate since downloads are already paused)
+        urlSession?.finishTasksAndInvalidate()
+        urlSession = nil
 
         // 4. Create new session with updated cellular config
         setupSession()
diff --git a/Yattee/Yattee-Bridging-Header.h b/Yattee/Yattee-Bridging-Header.h
index 5d592292..5e984a0c 100644
--- a/Yattee/Yattee-Bridging-Header.h
+++ b/Yattee/Yattee-Bridging-Header.h
@@ -8,4 +8,5 @@
 #ifndef Yattee_Bridging_Header_h
 #define Yattee_Bridging_Header_h
 #import "SMBBridge.h"
+#import "ObjCExceptionHandler.h"
 #endif /* Yattee_Bridging_Header_h */