Newly left rooms can crash clients

### Description

Described in more detail here:
https://github.com/element-hq/synapse/pull/19651
https://github.com/element-hq/element-x-android/pull/6532
https://github.com/element-hq/element-x-ios/pull/5354

I don't have a proper development environment to test these, but figured the PRs are more communicative.

### Steps to reproduce

See PRs for details.

### Homeserver

custom, up to date with https://github.com/spantaleev/matrix-docker-ansible-deploy

### Synapse Version

1.150.0

### Installation Method

Docker (matrixdotorg/synapse)

### Database

postgres

### Workers

Multiple workers

### Platform

https://github.com/spantaleev/matrix-docker-ansible-deploy on VPS

### Configuration

_No response_

### Relevant log output

```shell
See PRs.
```

### Anything else that would be useful to know?

Crashes clients in a really bad way.