Describe the bug

Unicode codepoint insertion stopped working sometimes around GNOME 44 update.

Steps To Reproduce

Steps to reproduce the behavior:

1. Press Ctrl-Shift-u
2. Type an unicode codepoint number (e.g. 2019) into the prompt.
3. Press Enter key
4. The prompt disappears without anything being inserted.

Expected behavior

Single quote/apostrophe should be inserted.

Screenshots

If applicable, add screenshots to help explain your problem.

Additional context

It happens on both XOrg and Wayland GNOME sessions, in various apps: GTK 4 (GNOME Text Editor), Qt (Telegram Desktop) and Firefox.
It does not happen when I remove i18n.inputMethod.enabled = "ibus"; from the test VM configuration.

Notify maintainers

@NixOS/freedesktop
@NixOS/gnome

Metadata

Using fresh NixOS VM on latest nixos-unstable 85b0815