diff --git a/WorkflowEngine.php b/WorkflowEngine.php
index 718aa11..d86bd6a 100644
--- a/WorkflowEngine.php
+++ b/WorkflowEngine.php
@@ -706,19 +706,24 @@ class WorkflowEngine {
     private function checkTransitionCondition(array $transition, array $instanceData): bool
     {
         if (!isset($transition['condition'])) {
-            // A transition without a condition is not automatic, but it is valid to pass through.
-            // The calling context (findAutomaticTransition) will decide if this is an error.
             return true;
         }
 
         $condition = $transition['condition'];
         $data = isset($instanceData['data_json']) ? json_decode($instanceData['data_json'], true) : [];
 
+        if (isset($condition['type']) && $condition['type'] === 'all_true') {
+            if (!isset($condition['fields']) || !is_array($condition['fields'])) return false;
+            foreach ($condition['fields'] as $f) {
+                if (empty($data[$f]) || $data[$f] == '0' || $data[$f] == False) return false;
+            }
+            return true;
+        }
+
         $field = $condition['field'] ?? null;
         $expectedValue = $condition['value'] ?? null;
 
         if ($field === null || $expectedValue === null) {
-            // Malformed condition
             return false;
         }
 
diff --git a/_get_instance_details.php b/_get_instance_details.php
index d56441d..185f1b8 100644
--- a/_get_instance_details.php
+++ b/_get_instance_details.php
@@ -57,12 +57,12 @@ $instance = $engine->getInstanceByDefId($person_id, $process_definition_id);
     $definition = $process['definition_json'] ? json_decode($process['definition_json'], true) : null;
     $isChecklist = ($definition && isset($definition['type']) && $definition['type'] === 'checklist');
     $events = $engine->getEvents($instanceId);
+    $instanceData = $instance['data_json'] ? json_decode($instance['data_json'], true) : [];
     ?>
 
     <?php if ($isChecklist): ?>
         <?php
         $tasks = $definition['tasks'] ?? [];
-        $instanceData = $instance['data_json'] ? json_decode($instance['data_json'], true) : [];
         ?>
         <div class="checklist-modal-container" data-instance-id="<?= $instanceId ?>">
             <h5>Zadania do wykonania</h5>