diff --git a/appinfo/info.xml b/appinfo/info.xml
index 5c4db0c..959f224 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -28,7 +28,7 @@ This app lets every user configure their own Deck automation workflows from Pers
 
 A background job periodically evaluates all enabled workflows and moves cards whose due date has passed, using Deck's own internal PHP classes only (no HTTP/OCS calls).
 ]]></description>
-    <version>34.0.1</version>
+    <version>34.0.2</version>
     <licence>agpl</licence>
     <author mail="patrick@niebel.ing">Patrick Niebeling</author>
     <namespace>WorkflowDeckAutomation</namespace>
diff --git a/lib/Service/WorkflowRunner.php b/lib/Service/WorkflowRunner.php
index d40bd61..2808ada 100644
--- a/lib/Service/WorkflowRunner.php
+++ b/lib/Service/WorkflowRunner.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace OCA\WorkflowDeckAutomation\Service;
 
+use DateTimeInterface;
 use OCA\Deck\Db\Card;
 use OCA\WorkflowDeckAutomation\Db\Workflow;
 use OCA\WorkflowDeckAutomation\Db\WorkflowMapper;
@@ -165,8 +166,10 @@ class WorkflowRunner {
 		// and the workflow wants a mail — this is decoration, not a check.
 		$targets = null;
 
+		$now = $this->timeFactory->getDateTime();
+
 		foreach ($cards as $card) {
-			if (!self::isOverdue($card->getDaysUntilDue())) {
+			if (!self::isOverdue($card->getDuedate(), $now)) {
 				continue;
 			}
 
@@ -319,8 +322,17 @@ class WorkflowRunner {
 		}
 	}
 
-	public static function isOverdue(?int $daysUntilDue): bool {
-		return $daysUntilDue !== null && $daysUntilDue < 0;
+	/**
+	 * Compares the card's actual due timestamp against $now instead of Deck's own
+	 * Card::getDaysUntilDue(), which truncates both sides to midnight before diffing
+	 * (DateInterval's %a is a whole-day count) and therefore reports 0 - not overdue -
+	 * for any card whose due time has already passed today. That silently held back
+	 * every card for up to 24h after it actually fell due; comparing the raw datetime
+	 * instead matches what Deck's own UI shows (e.g. "vor 2 Stunden") and has no
+	 * day-rounding step to get wrong.
+	 */
+	public static function isOverdue(?DateTimeInterface $duedate, DateTimeInterface $now): bool {
+		return $duedate !== null && $duedate < $now;
 	}
 
 	/**
diff --git a/package.json b/package.json
index 16a3a1e..de0f383 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "workflow_deck_automation",
-	"version": "34.0.1",
+	"version": "34.0.2",
 	"private": true,
 	"type": "module",
 	"description": "Automates moving overdue Deck cards between stacks, configurable per user.",
diff --git a/tests/Unit/Service/WorkflowRunnerFilterTest.php b/tests/Unit/Service/WorkflowRunnerFilterTest.php
index e9d553b..93b01b3 100644
--- a/tests/Unit/Service/WorkflowRunnerFilterTest.php
+++ b/tests/Unit/Service/WorkflowRunnerFilterTest.php
@@ -4,22 +4,35 @@ declare(strict_types=1);
 
 namespace OCA\WorkflowDeckAutomation\Tests\Unit\Service;
 
+use DateTimeImmutable;
 use OCA\WorkflowDeckAutomation\Service\WorkflowRunner;
 use PHPUnit\Framework\TestCase;
 
 class WorkflowRunnerFilterTest extends TestCase {
 	public function testIsOverdueReturnsFalseWithoutDueDate(): void {
-		$this->assertFalse(WorkflowRunner::isOverdue(null));
+		$this->assertFalse(WorkflowRunner::isOverdue(null, new DateTimeImmutable('2026-01-15 12:00:00')));
 	}
 
 	public function testIsOverdueReturnsFalseForFutureDueDate(): void {
-		$this->assertFalse(WorkflowRunner::isOverdue(0));
-		$this->assertFalse(WorkflowRunner::isOverdue(3));
+		$now = new DateTimeImmutable('2026-01-15 12:00:00');
+		$this->assertFalse(WorkflowRunner::isOverdue($now->modify('+1 hour'), $now));
+		$this->assertFalse(WorkflowRunner::isOverdue($now->modify('+3 days'), $now));
 	}
 
 	public function testIsOverdueReturnsTrueForPastDueDate(): void {
-		$this->assertTrue(WorkflowRunner::isOverdue(-1));
-		$this->assertTrue(WorkflowRunner::isOverdue(-30));
+		$now = new DateTimeImmutable('2026-01-15 12:00:00');
+		$this->assertTrue(WorkflowRunner::isOverdue($now->modify('-1 hour'), $now));
+		$this->assertTrue(WorkflowRunner::isOverdue($now->modify('-30 days'), $now));
+	}
+
+	public function testIsOverdueReturnsTrueForADueTimeEarlierTheSameDay(): void {
+		// Regression: comparing whole calendar days (as Deck's own
+		// Card::getDaysUntilDue() does) reports a card due earlier today as
+		// "0 days until due", not overdue, until the calendar date rolls
+		// over - holding every card back for up to 24h after it actually
+		// fell due. isOverdue() must compare the real timestamps instead.
+		$now = new DateTimeImmutable('2026-01-15 12:00:00');
+		$this->assertTrue(WorkflowRunner::isOverdue(new DateTimeImmutable('2026-01-15 06:00:00'), $now));
 	}
 
 	public function testNoFiltersMatchesAnyCard(): void {