ibus-pinyin not work when run wps in weston with xwayland

Hi,guys I compile and run the weston-10 on Ubuntu 20.04. My weston run commond is: weston --xwayland --logger-scopes=log,x11-backend,desktop-shell,xwm-wm-x11

I have alse installed wps on my Ubuntu.

I run wps through weston shell commond, but I can't use ibus-pinyin in wps.

Due to some format problem, I attach the weston log and weston.ini file, please check. weston.ini weston.log

If I run wps directly(without weston), ibus-pinyin woks fine. If I run wps through weston shell commond and replace ibus to fcitx5, fcitx5 works fine too.

So, I want to find how to solve this problem, please help me. Thanks a lot!