Keyboard does not work when trying to unlock encrypted USB drive

Hi,

I encrypted a USB drive, I stored some files in it, I removed it. Then I plugged it in and it asked me for the passphrase to unlock it, but the keyboard does not work in the box where I have to enter the passphrase. It does work everywhere else.

I can write the passphrase in the text editor, copy it and paste it into the unlocking box and everything works. But I prefer to fix it so that my passphrase is not shown when typing it into the text editor.

Thanks

Trisquel 7 in Gluglug X60