Home Assistant Live Update Notifications stopped working

I am on Home Assistant 2026.8.2 with Home Assistant Companion 2026.8.0 (2026.2739) on my iPhone running iOS27 Public Beta 2.
Testing the new Live Update Notifications for white goods (washing machine, tumble dryer and dishwasher), I noticed that they have stopped working.

Here an example of activating and updating the washing machine notification

action: notify.mobile_app_iphone
data:
  title: >
    {% set rem = states('sensor.washing_machine_time_remaining') | float(0) %}
    {% set hours = (rem // 60) | int %}
    {% set minutes = (rem % 60) | round(0) | int %}
    {% if hours > 0 and minutes > 0 %}
      Waschmaschine · {{ hours }}:{{ '%02d' % minutes }}
    {% else %}
      Waschmaschine · {{ minutes }} Min
    {% endif %}
  message: >
    {{ states('sensor.waschmaschine_current_course') }} · 
    {{ states('sensor.waschmaschine_run_state') }}
  data:
    live_update: true
    silent: true
    sticky: true
    progress: "{{ states('sensor.washing_machine_progress') | int(0) }}"
    progress_max: 100
    progress_bar_color: "#2196F3"
    notification_icon: mdi:washing-machine
    notification_icon_color: "#2196F3"
    url: /mobile-dashboard/laundry
    tag: "laundry-washer-live"

and the clearance thereof, when which is triggered, when the cycle has finished, as it is being replaced by a regular notification.

action: notify.mobile_app_iphone
data:
  message: "clear_notification"
  data:
    tag: "laundry-washer-live"

However shortly no notification is received by the companion app, although the automation is fully executed. I tried debugging by putting the block into the developer tools and noticed that I do receive a regular notification, when I remove the tag:

Nevermind … A reboot after updating to Public Beta 3 resolved the issue.