core: New IMAP sensor integration intermittent

The problem

I migrated my existing IMAP sensor to the new IMAP format, during which data from my existing sensor was incorporated in the newly created sensor. I have eventually managed to rewrite both the configuration entry and the automation that I previously used but the reponse/trigger from the new sensor setup is intermittent. The new sensor does not update reliably to reflect UnSeen/UnRead status, depending on the unread number of emails in the inbox at any given time. It can be remedied, albeit briefly, by reloading the template entity in Developer Tools or reloading the integration.

What version of Home Assistant Core has the issue?

2023.5.3

What was the last working version of Home Assistant Core?

pre 2023.5.2

What type of installation are you running?

Home Assistant OS

Integration causing the issue

IMAP integration

Link to integration documentation on our website

https://www.home-assistant.io/integrations/imap/

Diagnostics information

No response

Example YAML snippet

template:
- sensor: 
  - name: alarmmail
    state: '{{ trigger.event.data["sender"] }}'  
  trigger:
  - event_data:
      sender:
      - sender1@domain.co.uk
      - sender2@domain.co.uk
      - sender3@domain.co.uk
    event_type: imap_content
    id: custom_event
    platform: event   

- id: '1619965086400'
  alias: Mail received
  trigger:
    - platform: event
      event_type: imap_content
  condition:
    - condition: template
      value_template: "{{ trigger.event.data['sender'].endswith('@domain.co.uk') }}"
  action:
    - service: media_player.volume_set
      data:
        entity_id: media_player.googlehome0867
        volume_level: 0.4
    - service: tts.google_cloud_say
      data:
        entity_id: media_player.googlehome0867
        message: Mail received
    - service: telegram_bot.send_message
      data:
        message: Mail received
  mode: restart

Anything in the logs that might be useful for us?

Nothing in the logs

Additional information

I have reverted to my previous setup in the interim but am willing to test to provide diagnostic data.