I installed the application according to the instructions https://blog.simos.info/how-to-easily-run-graphics-accelerated-gui-apps-in-lxd-containers-on-your-ubuntu-desktop/. I also installed ibus-unikey in the gui container. The application works normally but I have problems with the input method, namely ibus-unikey, I cannot type Vietnamese on some applications such as chrome, viber, signal, etc. although I can type Vietnamese on firefox, gedit.
I need your help and sincerely thank you for any feedback!