adyen payment notification stalled by indexers

etc/cron_groups.xml

+<?xml version="1.0"?>
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Cron:etc/cron_groups.xsd">
+    <group id="adyen_payment">
+        <schedule_generate_every>1</schedule_generate_every>
+        <schedule_ahead_for>4</schedule_ahead_for>
+        <schedule_lifetime>2</schedule_lifetime>
+        <history_cleanup_every>10</history_cleanup_every>
+        <history_success_lifetime>60</history_success_lifetime>
+        <history_failure_lifetime>600</history_failure_lifetime>
+        <use_separate_process>1</use_separate_process>
+    </group>
+</config>

etc/crontab.xml

@@ -23,7 +23,7 @@
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Cron:etc/crontab.xsd">
-    <group id="index">
+    <group id="adyen_payment">
         <job name="adyen_payment_process_notification" instance="Adyen\Payment\Model\Cron" method="processNotification">
             <schedule>*/1 * * * *</schedule>
         </job>