Yet Another Shell

Hi, i am a new user of the yash(1) shell and i am enjoying it very much. I've noticed that in current emacs bindkey configuration Ctrl + Left arrow and Ctrl + Right arrow do not do anything, as in other shell they go forward and backword in word. i try to get this behavior back with the following:

bindkey --emacs '\^\R' forward-viword
bindkey --emacs '\^\L' backward-viword

But it does not have an affect. I have verified this by using any of the escape sequences in the manual page (\X, \H, \N, \P, \E, \H, \B, etc.) with Ctrl (\^) but they do not have an affect either.

Is this a bug with yash itself or something else?

For more information: I am running st(1) terminal emulator (attempted with alacritty terminal emulator), and the yash build flags are:

./configure \
--prefix=/usr \
--prefix=/usr \
--enable-help \
--enable-printf \
--enable-socket \
--enable-ulimit \
--enable-history \
--enable-lineedit \
--disable-nls

Thank you for your help.