errors with push notifications

### Steps to reproduce

1. Where are you starting? What can you see? -> Push History

note: Test notifications are always successful.

Errors Received:
- Unable to resolve event. Push not handled.
- Invalid or ignored push data: {"notification":"counts":{"unread":0)."id:"","sender":"type":null}}

### Outcome

#### What did you expect?
Notifications are received without error.

#### What happened instead?
Very few are received, and most have error.

### Your phone model

Samsung Galaxy

### Operating system version

Android 10

### Application version and app store

25.06.0

### Homeserver

matrix.org

### Will you send logs?

No

### Are you willing to provide a PR?

No