Notifications Not Auto-Acking

I have some services that are having frequent, small SNMP outages (down for ~30 seconds), and not all of the notifications are getting auto-acked. So, despite having a 2m delay on the notification path, I'm getting notified about issues that are already resolved, and not ever being told that they are resolved.

An example of a recent outage's timing:

But, the notification related to that (linked to the same outage event):

Users Notified

So, it didn't get acked at 10:06:07, so I got an email at 10:07:51, even though the outage was already resolved.

—

My config for notifications:

• Using auto-acknowledge-alarm:

   <auto-acknowledge-alarm resolution-prefix="RESOLVED: ">
      <uei>uei.opennms.org/nodes/serviceResponsive</uei>
      <uei>uei.opennms.org/nodes/nodeRegainedService</uei>
      <uei>uei.opennms.org/nodes/interfaceUp</uei>
      <uei>uei.opennms.org/nodes/nodeUp</uei>
      <uei>uei.opennms.org/correlation/remote/wideSpreadOutageResolved</uei>
      <!-- omit a few custom alarms for our environment -->
      <uei>uei.opennms.org/threshold/highThresholdRearmed</uei>
      <uei>uei.opennms.org/threshold/lowThresholdRearmed</uei>
      <uei>uei.opennms.org/internal/importer/importSuccessful</uei>
   </auto-acknowledge-alarm>

• Default queue handler stuff:

   <queue>
      <queue-id>default</queue-id>
      <interval>20s</interval>
      <handler-class&gt;
         <name>org.opennms.netmgt.notifd.DefaultQueueHandler</name>
      </handler-class&gt;
   </queue>

• Destination path:

   <path name="Email-Servers" initial-delay="2m">
      <target>
         <name>Servers_OnCall</name>
         <autoNotify>on</autoNotify>
         <command>javaEmail</command>
      </target>
   </path>

—

Right now, nothing shows up for this whole month in notifd.log (I assume the default logging level isn't going to show me anything), but I do see this in alarmd for the specific alarm in question:

2020-07-08 10:10:31,613 WARN [alarmd-Thread-4-of-4] o.o.n.a.d.DroolsAlarmContext: Failed to acquire Drools session lock within 20000ms. Add or update for alarm with id=6059035
and reduction-key=uei.opennms.org/nodes/nodeLostService::2751:10.xx.xx.xx:SNMP will not be immediately reflected in the context.