I’ve installed Void Linux base image and my backspace key is broken when I am root, it types ‘^H’ instead of erasing. Function keys also type something weird, but at least the brighness-related ones do work.
This only applies to the root shell, it all works perfectly when I login as a normal user. Probably a bashrc issue?
UPD: I typed ‘stty erase ^H’ in the shell and it now works.
This is one of those issues where there’s a billion different solutions based on a billion different reasons.
Have you compared the configuration files? You most likely have some keybinding that root don’t have, and hopefully works for root as well.