Grouped notifications leave blank item behind

**Home Assistant Android version:** 2022.1.1-full

**Android version:** 11

**Phone model:** OnePlus 8 Pro

**Home Assistant version:** 2021.12.10

**Last working Home Assistant release (if known):** Unknown

**Description of problem:** When sending a notification that uses the "group" property in the service data, a blank notification is left behind after tapping on the correctly displayed initial notification. This appears to happen when group is the only property and when combinations of group, tag, and channel are used. Calling the service again with clear_notification message after this doesn't seem to clear the notification. Sending a new notification in the same group replaces this blank one.

**Traceback (if applicable, to get the logs you may refer to: https://companion.home-assistant.io/docs/troubleshooting/faqs/#android-crash-logs):**

```

```

**Screenshot of problem:**

**Additional information:**