Typing one by one to learn

When i do not recall a ( new) word in japanese or do not know exacty how to write this, memrise has the option to reveal the word blindly typning the caracters one by one : this works, only it is still a word that i do NOT KNOW for 100%. Only memrise sees this as a “good answer”, that i could only construct by typing in the pencel-button some times. And obviously this is a good answer.
So this word is not moved to the “difficult word” list and that is, as far as I know a missed chance. because i faster learn this in the “difficult word” section.
And too: when i fully type in the word it is gone just after typing in the last caracter, i even can not read the word as a whole after hitting the pencilpbutten some times.

My work around is just to type in mistaken caracters at the end ( so it is worng) … only this can be done better by move it to the “difficilt word list”

( Sorry for my english )
best regards