Not seeing the latest thread message when it's in the summary

### Steps to reproduce

1. I don't know
2. See a thread

### Outcome

#### What did you expect?

When I open the thread, the last message I see is the message in the summary

#### What happened instead?

(Rarely) it doesn't show all new messages in a thread.

### Your phone model

_No response_

### Operating system version

_No response_

### Application version and app store

26.08.1 (F-Droid)

### Homeserver

_No response_

### Will you send logs?

Yes

### Will you submit a Pull Request?

No

Start by reproducing the issue in the thread view using Element X Android 26.08.1 from F-Droid, comparing the latest message shown in the summary with the messages shown after opening the thread. The report provides no device, operating-system, homeserver, file, or test details, so capture those details and identify reliable reproduction steps before defining the fix. Done means all new thread messages appear when the thread is opened.

Written by the indexing model from the issue text.