Gmail IMAP sensor stops working after a period of time

1

I have updated to 2023.5.2 and migrated my gmail imap sensor that turns on lights when the alarm is disarmed and turns off lights when it is armed:

template:
  - trigger:
      - platform: event      
        event_type: "imap_content"
        id: "custom_event"
        event_data:
          sender: "[email protected]"
    sensor:
      - name: Alarm Status
        state: >
          {% if 'Armed Away' in trigger.event.data["subject"] %}
            armed_away
          {% elif 'Armed Stay' in trigger.event.data["subject"] %}
            armed_stay
          {% elif 'Disarmed' in trigger.event.data["subject"] %}
            disarmed
          {% endif %}

Problem is that is seems to stop working after a period of time. So does the generic imap sensor I set up just to see all email traffic to help debug.
When I restart Home Assistant it starts working again. I can’t see anything in the log at the time to tell me what’s gone wrong. Any ideas?

2

Happened again this morning. Had to restart HA. There’s nothing in the log.
Probably coincidence but both times it has stopped working with an email from the local weather blog.