diff --git a/capture-sdk/sdk/src/main/java/net/gini/android/capture/camera/CameraFragmentImpl.java b/capture-sdk/sdk/src/main/java/net/gini/android/capture/camera/CameraFragmentImpl.java
index 16180e9588..4f63ec07ce 100644
--- a/capture-sdk/sdk/src/main/java/net/gini/android/capture/camera/CameraFragmentImpl.java
+++ b/capture-sdk/sdk/src/main/java/net/gini/android/capture/camera/CameraFragmentImpl.java
@@ -20,7 +20,6 @@
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import net.gini.android.capture.AsyncCallback;
 import net.gini.android.capture.Document;
@@ -38,6 +37,7 @@
 import net.gini.android.capture.document.ImageMultiPageDocument;
 import net.gini.android.capture.document.QRCodeDocument;
 import net.gini.android.capture.error.ErrorActivity;
+import net.gini.android.capture.error.ErrorType;
 import net.gini.android.capture.help.HelpActivity;
 import net.gini.android.capture.internal.camera.api.CameraException;
 import net.gini.android.capture.internal.camera.api.CameraInterface;
@@ -49,6 +49,7 @@
 import net.gini.android.capture.internal.camera.view.QRCodePopup;
 import net.gini.android.capture.internal.fileimport.FileChooserActivity;
 import net.gini.android.capture.internal.network.AnalysisNetworkRequestResult;
+import net.gini.android.capture.internal.network.FailureException;
 import net.gini.android.capture.internal.network.NetworkRequestsManager;
 import net.gini.android.capture.internal.qrcode.PaymentQRCodeData;
 import net.gini.android.capture.internal.qrcode.PaymentQRCodeReader;
@@ -69,8 +70,6 @@
 import net.gini.android.capture.logging.ErrorLog;
 import net.gini.android.capture.logging.ErrorLogger;
 import net.gini.android.capture.network.Error;
-import net.gini.android.capture.error.ErrorType;
-import net.gini.android.capture.internal.network.FailureException;
 import net.gini.android.capture.network.model.GiniCaptureExtraction;
 import net.gini.android.capture.network.model.GiniCaptureSpecificExtraction;
 import net.gini.android.capture.requirements.CameraHolder;
@@ -101,7 +100,6 @@
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.constraintlayout.widget.Group;
 import androidx.core.content.ContextCompat;
-
 import jersey.repackaged.jsr166e.CompletableFuture;
 import kotlin.Unit;
 
@@ -580,7 +578,6 @@ void onSaveInstanceState(@NonNull final Bundle outState) {
 
     void onStop() {
         closeCamera();
-
         if (mPaymentQRCodePopup != null) {
             mPaymentQRCodePopup.hide();
         }
@@ -1334,7 +1331,7 @@ private void showInvalidFileAlert(final String message) {
 
         mFragment.showAlertDialog(message,
                 activity.getString(R.string.gc_document_import_close_error),
-                (dialogInterface, i) -> dialogInterface.dismiss() , null, null, null);
+                (dialogInterface, i) -> dialogInterface.dismiss(), null, null, null);
     }
 
     @UiThread
diff --git a/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/camera/view/QRCodePopup.kt b/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/camera/view/QRCodePopup.kt
index 4ae4b86834..81cf37b030 100644
--- a/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/camera/view/QRCodePopup.kt
+++ b/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/camera/view/QRCodePopup.kt
@@ -76,7 +76,6 @@ internal class QRCodePopup<T> @JvmOverloads constructor(
             fragmentImplCallback.view?.postDelayed(hideRunnable, hideDelayMs)
             return
         }
-        isShown = true
         showViews()
         fragmentImplCallback.view?.removeCallbacks(hideRunnable)
         fragmentImplCallback.view?.postDelayed(hideRunnable, hideDelayMs)
@@ -124,7 +123,6 @@ internal class QRCodePopup<T> @JvmOverloads constructor(
     }
 
     private fun progressViews() {
-
         qrCheckImage.visibility = View.GONE
         qrImageFrame.visibility = View.INVISIBLE
         loadingIndicatorContainer?.modifyAdapterIfOwned { it.onVisible() }
@@ -133,7 +131,6 @@ internal class QRCodePopup<T> @JvmOverloads constructor(
     }
 
     private fun hideViews() {
-
         qrStatusTxt.visibility = View.GONE
         qrCheckImage.visibility = View.GONE
         qrImageFrame.visibility = View.VISIBLE
diff --git a/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/qrcode/PaymentQRCodeReader.java b/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/qrcode/PaymentQRCodeReader.java
index 1c91000066..b7b8b70b74 100644
--- a/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/qrcode/PaymentQRCodeReader.java
+++ b/capture-sdk/sdk/src/main/java/net/gini/android/capture/internal/qrcode/PaymentQRCodeReader.java
@@ -43,6 +43,7 @@ public void onNonPaymentQRCodeDetected(@NonNull final String qrCodeContent) {
         public void onQRCodeReaderFail() {
         }
     };
+    private boolean isReleased = false;
 
     /**
      * Create a new instance which uses the provided {@link QRCodeDetectorTask} to do QRCode
@@ -66,6 +67,9 @@ private PaymentQRCodeReader(
         mDetector.setListener(new QRCodeDetector.Listener() {
             @Override
             public void onQRCodesDetected(@NonNull final List<String> qrCodes) {
+                if (isReleased) {
+                    return;
+                }
                 for (final String qrCodeContent : qrCodes) {
                     try {
                         final PaymentQRCodeData paymentData = mParser.parse(qrCodeContent);
@@ -119,6 +123,7 @@ public void readFromByteArray(@NonNull final byte[] image, @NonNull final Size i
      * Release all resources. Detection not possible after this has been called.
      */
     public void release() {
+        isReleased = true;
         mDetector.release();
     }