Search does not "look into" all rooms

### Steps to reproduce

I open a chat or a room (with multiple users) and click on the "search" button in the right upper corner (next to videocall and threads). I then enter a string that I would like to search for. I have one chat that I cannot search in (no with "in this room" and with "in all rooms"). I do not know how to reproduce this reliably with other accounts.
What I did so far: I deleted the search index, and activated and deactivated the indexing of messages a few times and restarted the desktop app. Nothing helped.

### Outcome

#### What did you expect?
I expected a list of search results for the room that I want to search in.

#### What happened instead?
I did not receive any search results.

### Operating system

Windows 10, 64-bit

### Application version

Element Version: 1.11.29,Olm Version : 3.2.12

### How did you install the app?

https://element.io/download

### Homeserver

matrix.org

### Will you send logs?

Yes