i guess there is a terminal installed (maybe xterm) - have a look at the dependencies:
% apt show lxde-core Package: lxde-core Version: 9 Priority: optional Section: metapackages Source: lxde-metapackages Maintainer: Debian LXDE Maintainers <[email protected]> Installed-Size: 11,3 kB Depends: lxpanel, pcmanfm, lxde-session Recommends: gksu, lxterminal | x-terminal-emulator, notification-daemon, xscreensaver Suggests: firefox-esr | firefox | www-browser, lxde, lxlauncher so lxde-core will never install lxterminal. Thats the expected behaviour and not a bug - lxde-core is for users who want to select their packages mostly themselve. https://askubuntu.com/questions/366135/how-to-search-for-packages-that-provides-a-virtual-package Cheers Alf

