diff --git a/app/src/main/java/com/emanuelef/remote_capture/CaptureService.java b/app/src/main/java/com/emanuelef/remote_capture/CaptureService.java
index e15b6c20..934f4ca0 100644
--- a/app/src/main/java/com/emanuelef/remote_capture/CaptureService.java
+++ b/app/src/main/java/com/emanuelef/remote_capture/CaptureService.java
@@ -92,6 +92,7 @@ public class CaptureService extends VpnService implements Runnable {
     private static final int NOTIFY_ID_VPNSERVICE = 1;
     private static CaptureService INSTANCE;
     private ParcelFileDescriptor mParcelFileDescriptor;
+    private boolean mIsAlwaysOnVPN;
     private CaptureSettings mSettings;
     private Billing mBilling;
     private Handler mHandler;
@@ -171,32 +172,40 @@ public class CaptureService extends VpnService implements Runnable {
     }
 
     private int abortStart() {
-        // NOTE: startForeground must be called before stopSelf, otherwise an exception will occur
+        // NOTE: startForeground must be called before stopSelf, otherwise an exception will occur:
+        // android.app.ForegroundServiceDidNotStartInTimeException: Context.startForegroundService() did not then call Service.startForeground()
         setupNotifications();
+
+        // Note: in Android 12, this may generate a ForegroundServiceStartNotAllowedException
+        // if called when the app is in background.
         startForeground(NOTIFY_ID_VPNSERVICE, getStatusNotification());
 
         stopSelf();
         sendServiceStatus(SERVICE_STATUS_STOPPED);
-        return START_STICKY;
+        return START_NOT_STICKY;
     }
 
     @Override
-    public int onStartCommand(Intent intent, int flags, int startId) {
+    public int onStartCommand(@Nullable Intent intent, int flags, int startId) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         mHandler = new Handler(Looper.getMainLooper());
         mBilling = Billing.newInstance(this);
 
-        if (intent == null) {
-            Log.d(CaptureService.TAG, "NULL intent onStartCommand");
-            return abortStart();
-        }
-
         Log.d(CaptureService.TAG, "onStartCommand");
-        mSettings = (CaptureSettings) intent.getSerializableExtra("settings");
 
-        if (mSettings == null) {
-            Log.e(CaptureService.TAG, "Missing capture settings");
-            return abortStart();
-        }
+        // NOTE: a null intent may be delivered due to START_STICKY
+        mSettings = (CaptureSettings) ((intent == null) ? null : intent.getSerializableExtra("settings"));
+        if(mSettings == null) {
+            // An Intent without extras is delivered in case of always on VPN
+            // https://developer.android.com/guide/topics/connectivity/vpn#always-on
+            mIsAlwaysOnVPN = (intent != null);
+
+            Log.d(CaptureService.TAG, "Missing capture settings, using previous ones");
+            mSettings = new CaptureSettings(prefs);
+            if(mIsAlwaysOnVPN)
+                mSettings.root_capture = false;
+        } else
+            mIsAlwaysOnVPN = false;
 
         // Retrieve DNS server
         dns_server = FALLBACK_DNS_SERVER;
@@ -284,7 +293,6 @@ public class CaptureService extends VpnService implements Runnable {
         } else
             app_filter_uid = -1;
 
-        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         mMalwareDetectionEnabled = Prefs.isMalwareDetectionEnabled(this, prefs);
 
         if(!mSettings.root_capture) {
@@ -357,6 +365,8 @@ public class CaptureService extends VpnService implements Runnable {
 
         setupNotifications();
         startForeground(NOTIFY_ID_VPNSERVICE, getStatusNotification());
+
+        // If the service is killed (e.g. due to low memory), then restart it with a NULL intent
         return START_STICKY;
     }
 
@@ -621,6 +631,10 @@ public class CaptureService extends VpnService implements Runnable {
                 (INSTANCE.mCaptureThread != null));
     }
 
+    public static boolean isAlwaysOnVPN() {
+        return((INSTANCE != null) && INSTANCE.mIsAlwaysOnVPN);
+    }
+
     private void checkBlacklistsUpdates() {
         if(!mMalwareDetectionEnabled || (mBlacklistsUpdateThread != null))
             return;
diff --git a/app/src/main/java/com/emanuelef/remote_capture/fragments/StatusFragment.java b/app/src/main/java/com/emanuelef/remote_capture/fragments/StatusFragment.java
index 3dd7e12b..a142b576 100644
--- a/app/src/main/java/com/emanuelef/remote_capture/fragments/StatusFragment.java
+++ b/app/src/main/java/com/emanuelef/remote_capture/fragments/StatusFragment.java
@@ -338,6 +338,7 @@ private void refreshPcapDumpInfo() {
                             ContextCompat.getDrawable(requireContext(), android.R.drawable.ic_media_play));
                     mMenuItemStartBtn.setTitle(R.string.start_button);
                     mMenuItemStartBtn.setEnabled(true);
+                    mMenuItemStartBtn.setVisible(true);
                     mMenuSettings.setEnabled(true);
                 }
 
@@ -359,6 +360,7 @@ private void refreshPcapDumpInfo() {
                             ContextCompat.getDrawable(requireContext(), R.drawable.ic_media_stop));
                     mMenuItemStartBtn.setTitle(R.string.stop_button);
                     mMenuItemStartBtn.setEnabled(true);
+                    mMenuItemStartBtn.setVisible(!CaptureService.isAlwaysOnVPN());
                     mMenuSettings.setEnabled(false);
                 }
 
diff --git a/app/src/main/java/com/emanuelef/remote_capture/model/CaptureSettings.java b/app/src/main/java/com/emanuelef/remote_capture/model/CaptureSettings.java
index 30f20ddb..14a8b976 100644
--- a/app/src/main/java/com/emanuelef/remote_capture/model/CaptureSettings.java
+++ b/app/src/main/java/com/emanuelef/remote_capture/model/CaptureSettings.java
@@ -7,19 +7,19 @@ import android.os.Bundle;
 import java.io.Serializable;
 
 public class CaptureSettings implements Serializable {
-    public final Prefs.DumpMode dump_mode;
-    public final String app_filter;
-    public final String collector_address;
-    public final int collector_port;
-    public final int http_server_port;
-    public final boolean socks5_enabled;
-    public final String socks5_proxy_address;
-    public final int socks5_proxy_port;
-    public final boolean ipv6_enabled;
-    public final boolean root_capture;
-    public final boolean pcapdroid_trailer;
-    public final String capture_interface;
-    public final String pcap_uri;
+    public Prefs.DumpMode dump_mode;
+    public String app_filter;
+    public String collector_address;
+    public int collector_port;
+    public int http_server_port;
+    public boolean socks5_enabled;
+    public String socks5_proxy_address;
+    public int socks5_proxy_port;
+    public boolean ipv6_enabled;
+    public boolean root_capture;
+    public boolean pcapdroid_trailer;
+    public String capture_interface;
+    public String pcap_uri;
 
     public CaptureSettings(SharedPreferences prefs) {
         dump_mode = Prefs.getDumpMode(prefs);