diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46bb3a83..092e07ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -410,4 +410,8 @@ Compatible from Shopware 6.5.0 up to 6.5.6.1
 - Fix: SalesChannelContextServiceDecorator now uses context token from URL on payment return routes (buckaroo/cancel, checkout/finish, /payment/) to restore session when cookies are not sent.
 - Fix: PaymentContextRestoreSubscriber runs earlier (priority 5) to restore context before Shopware resolves the sales channel.
 - Fix: PaymentReturnContextSubscriber now appends context token to all storefront redirects (checkout, account), not just checkout/finish.
-- Added: PaymentContextCookieSubscriber to explicitly set sw-context-token cookie when restored from URL, enabling use of cookie_samesite: lax without requiring null.
\ No newline at end of file
+- Added: PaymentContextCookieSubscriber to explicitly set sw-context-token cookie when restored from URL, enabling use of cookie_samesite: lax without requiring null.
+
+# 3.2.4
+
+- BTI-684 Fix: Payment finalize token replay causes error after successful async payment (Wero/mobile) #405
\ No newline at end of file
diff --git a/composer.json b/composer.json
index c5f4b1db..0a96e68c 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "buckaroo/shopware6",
     "description": "Buckaroo payment provider plugin for Shopware 6",
     "type": "shopware-platform-plugin",
-    "version": "3.2.3",
+    "version": "3.2.4",
     "license": "proprietary",
     "minimum-stability": "stable",
     "require": {
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index eec0aef3..cd7e25c2 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -171,6 +171,13 @@
             <tag name="kernel.event_subscriber"/>
         </service>
 
+        <service id="Buckaroo\Shopware6\Subscribers\PaymentTokenInvalidatedSubscriber">
+            <argument type="service" id="order_transaction.repository"/>
+            <argument type="service" id="Symfony\Component\Routing\Generator\UrlGeneratorInterface"/>
+            <argument type="service" id="Psr\Log\LoggerInterface"/>
+            <tag name="kernel.event_subscriber"/>
+        </service>
+
         <service id="Buckaroo\Shopware6\Subscribers\PaymentContextRestoreSubscriber">
             <tag name="kernel.event_subscriber"/>
         </service>
diff --git a/src/Subscribers/PaymentTokenInvalidatedSubscriber.php b/src/Subscribers/PaymentTokenInvalidatedSubscriber.php
new file mode 100644
index 00000000..dc1ec3ea
--- /dev/null
+++ b/src/Subscribers/PaymentTokenInvalidatedSubscriber.php
@@ -0,0 +1,203 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buckaroo\Shopware6\Subscribers;
+
+use Psr\Log\LoggerInterface;
+use Shopware\Core\Framework\Context;
+use Shopware\Core\Framework\DataAbstractionLayer\EntityRepository;
+use Shopware\Core\Framework\DataAbstractionLayer\Search\Criteria;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Event\ExceptionEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+/**
+ * Handles the back-button / double-redirect scenario for async payments (e.g. Wero, iDEAL).
+ *
+ * Shopware's _sw_payment_token is one-time-use: after the first successful finalize
+ * the record is deleted (or marked consumed) from the payment_token table. If the
+ * customer presses back and the Buckaroo page re-fires the redirect with the same URL,
+ * Shopware throws CHECKOUT__PAYMENT_TOKEN_INVALIDATED before the plugin handler is
+ * reached, resulting in a raw error page.
+ */
+class PaymentTokenInvalidatedSubscriber implements EventSubscriberInterface
+{
+    private const TOKEN_INVALIDATED_CODE = 'CHECKOUT__PAYMENT_TOKEN_INVALIDATED';
+
+    /** Transaction technical names that represent a completed successful payment */
+    private const SUCCESS_STATES = [
+        'paid',
+        'paid_partially',
+        'authorized',
+    ];
+
+    public function __construct(
+        private readonly EntityRepository $orderTransactionRepository,
+        private readonly UrlGeneratorInterface $urlGenerator,
+        private readonly LoggerInterface $logger
+    ) {
+    }
+
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            KernelEvents::EXCEPTION => ['onKernelException', 10],
+        ];
+    }
+
+    public function onKernelException(ExceptionEvent $event): void
+    {
+        if (!$event->isMainRequest()) {
+            return;
+        }
+
+        if (!$this->isTokenInvalidatedException($event->getThrowable())) {
+            return;
+        }
+
+        $request = $event->getRequest();
+        $paymentToken = $request->query->get('_sw_payment_token');
+
+        if (!is_string($paymentToken) || $paymentToken === '') {
+            return;
+        }
+
+        try {
+            $redirectUrl = $this->resolveRedirectUrl($paymentToken, $request);
+        } catch (\Throwable $e) {
+            $this->logger->warning(
+                'Buckaroo: Could not resolve redirect URL for invalidated payment token — leaving default error handling in place',
+                ['exception' => $e->getMessage()]
+            );
+            return;
+        }
+
+        $this->logger->info(
+            'Buckaroo: Redirecting after invalidated payment token (back-button / double-redirect scenario)',
+            ['redirectUrl' => $redirectUrl]
+        );
+
+        $event->setResponse(new RedirectResponse($redirectUrl));
+        $event->stopPropagation();
+    }
+
+    private function isTokenInvalidatedException(\Throwable $exception): bool
+    {
+        // Shopware 6.4 (TokenInvalidatedException) and 6.5+ (PaymentException) both
+        // expose getErrorCode() returning the same constant.
+        if (method_exists($exception, 'getErrorCode')) {
+            return $exception->getErrorCode() === self::TOKEN_INVALIDATED_CODE;
+        }
+
+        return str_contains(get_class($exception), 'TokenInvalidated');
+    }
+
+    /**
+     * Decode the JWT payload directly — no parseToken() call, no DB access.
+     * JWTFactoryV2::parseToken() would throw the same tokenInvalidated exception
+     * because the record no longer exists in payment_token. The JWT signature is
+     * still valid; we only need the plaintext claims embedded in the token.
+     */
+    private function resolveRedirectUrl(string $paymentToken, Request $request): string
+    {
+        $payload = $this->decodeJwtPayload($paymentToken);
+
+        // 'ful' and 'eul' are stored as relative paths (e.g. /checkout/finish?orderId=...)
+        $finishUrl = $this->makeAbsolute($payload['ful'] ?? null, $request);
+        $errorUrl = $this->makeAbsolute($payload['eul'] ?? null, $request);
+        $transactionId = isset($payload['sub']) && is_string($payload['sub']) ? $payload['sub'] : null;
+
+        if ($transactionId !== null) {
+            try {
+                if ($this->isPaymentSuccessful($transactionId)) {
+                    return $finishUrl ?? $this->accountOrdersUrl();
+                }
+
+                return $errorUrl ?? $this->accountOrdersUrl();
+            } catch (\Throwable $e) {
+                $this->logger->warning(
+                    'Buckaroo: Could not determine transaction state for invalidated token — falling back to finishUrl',
+                    ['transactionId' => $transactionId, 'exception' => $e->getMessage()]
+                );
+            }
+        }
+
+        return $finishUrl ?? $errorUrl ?? $this->accountOrdersUrl();
+    }
+
+    /**
+     * Decode the payload (second) segment of a JWT without signature verification.
+     * We only need the plaintext claims — the signature was already verified by
+     * Shopware core before tokenInvalidated was thrown.
+     *
+     * @return array<string, mixed>
+     * @throws \InvalidArgumentException if the token is structurally malformed
+     */
+    private function decodeJwtPayload(string $token): array
+    {
+        $parts = explode('.', $token);
+        if (count($parts) !== 3) {
+            throw new \InvalidArgumentException('Invalid JWT: expected 3 dot-separated parts');
+        }
+
+        // JWT uses base64url encoding (RFC 4648 §5) — swap - and _ back to + and /
+        $decoded = base64_decode(str_replace(['-', '_'], ['+', '/'], $parts[1]), true);
+        if ($decoded === false) {
+            throw new \InvalidArgumentException('JWT payload could not be base64-decoded');
+        }
+
+        $data = json_decode($decoded, true);
+        if (!is_array($data)) {
+            throw new \InvalidArgumentException('JWT payload is not a valid JSON object');
+        }
+
+        return $data;
+    }
+
+    private function makeAbsolute(?string $path, Request $request): ?string
+    {
+        if ($path === null || $path === '') {
+            return null;
+        }
+
+        if (str_starts_with($path, 'http://') || str_starts_with($path, 'https://')) {
+            return $path;
+        }
+
+        return $request->getSchemeAndHttpHost() . $path;
+    }
+
+    private function isPaymentSuccessful(string $transactionId): bool
+    {
+        $criteria = new Criteria([$transactionId]);
+        $criteria->addAssociation('stateMachineState');
+
+        $transaction = $this->orderTransactionRepository
+            ->search($criteria, Context::createDefaultContext())
+            ->first();
+
+        if ($transaction === null) {
+            return false;
+        }
+
+        $state = $transaction->getStateMachineState();
+        if ($state === null) {
+            return false;
+        }
+
+        return in_array($state->getTechnicalName(), self::SUCCESS_STATES, true);
+    }
+
+    private function accountOrdersUrl(): string
+    {
+        return $this->urlGenerator->generate(
+            'frontend.account.order.page',
+            [],
+            UrlGeneratorInterface::ABSOLUTE_URL
+        );
+    }
+}