I've found a confirmation for the described bug is `agetty` only related at Arch forum.
https://bbs.archlinux.org/viewtopic.php?id=142031 Quote: «When I log in through TTY, if I press any of the arrow keys, my cursor moves independently of what is typed for the login information. When I log in through TTY, if I press any of the arrow keys, my cursor moves independently of what is typed for the login information. ... Found what some might consider a solution...it does fix the free-floating arrows anyway haha. I replaced agetty with mingetty» -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org