"You can't see earlier messages" in a non-encrypted room

### Steps to reproduce

1. Use Element for some time
2. Go to `#heisenbridge:vi.fi` yesterday (a public room without encryption)

### Outcome

#### What did you expect?

I should continue being able to see most of the room history.

#### What happened instead?

Most of the room history is now unavailable.


- Notably, unlike other filed issues on similar problems, this room is *not* encrypted.
- If I click on a link leading to an older event in history, Element does show the old history, however then I cannot scroll to the bottom of the room to see the latest history.
- The "Clear cache and reload" button had no effect.
- The history does load fine from a matrix.org account.
- The history also loads fine from a different client (nheko).
- One other user in the channel reported having the same problem, so it does not seem to be unique to me.

### Operating system

Arch Linux x86_64

### Browser information

Firefox 114.0.2 (64-bit)

### URL for webapp

Self-hosted

### Application version

Element version: 1.11.35 Olm version: 3.2.14

### Homeserver

Synapse 1.87.0

### Will you send logs?

Yes

No source files or tests are named. Start by reproducing the missing-history behavior in Element using the reported public, non-encrypted room and compare it with matrix.org and nheko; done means the room history loads and remains scrollable to the latest messages.

Written by the indexing model from the issue text.