Old notifications sent to Android Auto at every car start

**Home Assistant Android app version(s):**

**Android version(s):**
14

**Device model(s):**
Pixel 5

**Home Assistant version:**
2026.1.1

**Last working Home Assistant release (if known):**
n/a

**Description of problem, include YAML if issue is related to notifications:**
All unconfirmed messages are sent to the android auto display, every time the car is started. The result is, every time I start the car I get many messages, one every 10 seconds, saying "garage opened", "garage closed", "garage opened",... all from the past days. I have to go into the messages menu of android car and delete all messages.

I assume Android car has no storage by itself, thus all available messages are sent again when the connection is established. But the result is, you get many notification pop ups. It would be okay to show that there are 20 unconfirmed messages but 20 new popups that look as if the message was sent right this second, is counter productive. This is not an email program but an event notification.

--details--

I have an automation that opens/closes the garage door when the car is approaching and leaving. This works very well and when looking at the automation traces, I can see that the automation is executed just twice a day.

Part of the automation is:
```
action: notify.mobile_app_pixel_5
metadata: {}
data:
data:
car_ui: true
notification_icon: mdi:door-open
channel: ha
importance: high
message: Garage öffnet
```

Say, I got 2 messages yesterday. If I start the car and the companion app connects to the car, I get yesterday's messages shown on the car screen again plus one more 2 minutes later, when the automation is triggered. Next time I start the car I get 3 messages at start plus later one more when the automation is triggered. Next time four messages at car start...

What makes it worse is that every single message is shown as popup individually and with a 10 second pause.

**Companion App Logs:**

```

```

**Screenshot or video of problem:**

**Additional information:**