Some messages don't trigger a push notification

### Steps to reproduce

1. happens sometimes, can not reproduce reliably

### Outcome

#### What did you expect?
stability
#### What happened instead?
sometimes there is just no push...

I made an issue for this a while back on the sygnal repo but I'm not sure it's a problem there... I'll link this issue over there as well
https://github.com/matrix-org/sygnal/issues/169

### Your phone models and operating system version

Galaxy A51 (Android 11), Xiaomi Mi 11 Lite (Android 12)

### Application version and app store

1.3.15

### Homeserver

Https://mx.chagai.website

### Will you send logs?

Yes