Fcitx5 not working in layer-shell surface when switching focus from kitty

[ksp-apoc]

System Info

Hyprland 0.54.3 built from branch v0.54.3 at commit 521ece463c4a9d3d128670688a34756805a4328f
Tag: v0.54.3, commits: 7014
System: Arch Linux, Linux 6.19.9-zen1-1-zen
GPU: NVIDIA GB205M [GeForce RTX 5070 Ti Mobile] + AMD Raphael

• Fcitx5: 5.1.19
• Kitty: 0.46.2

Bug Description

When kitty terminal has focus, pressing Super+Space to open a layer-shell surface (a spotlight/launcher), fcitx5 input method does not work in the launched layer-shell surface. I cannot switch input methods or type CJK characters.

However, if the focus is on any other application (e.g., Firefox, file manager) before opening the same spotlight, fcitx5 works perfectly.

Steps to Reproduce

1. Open kitty terminal and make sure it has focus
2. Press Super+Space to open a layer-shell launcher/spotlight
3. Try to use fcitx5 to switch input method — it does not respond
4. Close the spotlight, focus any other window (e.g., Firefox)
5. Press Super+Space again to open the same spotlight
6. Fcitx5 works normally

Expected Behavior

Fcitx5 should work in the layer-shell surface regardless of which window previously had focus.

Additional Context

• This issue does not occur on niri compositor with the exact same setup, which suggests a difference in how zwp_text_input_v3 focus (enter/leave events) is handled when switching from kitty to a layer-shell surface.
• IM environment variables are correctly set (GTK_IM_MODULE=fcitx, QT_IM_MODULE=fcitx, XMODIFIERS=@im=fcitx, INPUT_METHOD=fcitx, SDL_IM_MODULE=fcitx).
• Possibly related to from typing in firefox focus terminal window, fcitx5 refuse to work #4290 (fcitx5 focus issue when switching between windows).