Typing accented characters in the keyboard layout test box produces unexpected input

### What Happened?

See screen recording below.

https://github.com/user-attachments/assets/acb2bd88-4599-421f-9593-a42a542aba63

### Steps to Reproduce

1. Boot the elementary OS 8 install media and start the installer.
2. In the keyboard layout setup, choose a language with accented characters (like Spanish or Portuguese), then try typing them in the test box.

### Expected Behavior

When I press the key combination `´` + `e` it should produce `é`, which it does; but it's also producing `é´` — `é` followed by a lone accent character `´`.
Same with `^` + `e` = `ê`. It produces `ê^`.

### OS Version

8.x (Circe)

### Session Type

Classic Session (X11, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

_No response_

### Hardware Info

- Dell Inspiron 15 3583
- amd64 arch