Room keys not saved just after resetting secure backup on personal homeserver

### Steps to reproduce

1. reset server backup
2. enter a passphrase
3. logout (no other device remains)
4. log in
5. enter the passphrase to get stored keys

### Outcome

#### What did you expect?

Messages in encrypted rooms should be readable

#### What happened instead?

Messages in encrypted rooms are unreadable

### Operating system

Linux

### Application version

1.11.3

### How did you install the app?

with apt form https://packages.element.io/debian/

### Homeserver

Synapse 1.63.1

### Will you send logs?

No