Thank you for your bug report. Seems you are not the only one, it's discussed also on https://www.reddit.com/r/yubikey/comments/1b5pjzq/strange_gpg_error_when_using_keytocard/ and might be worth reporting upstream on https://dev.gnupg.org/maniphest/task/edit/form/3/
Thank you for your bug report. Seems you are not the only one, it's discussed also on https:/ /www.reddit. com/r/yubikey/ comments/ 1b5pjzq/ strange_ gpg_error_ when_using_ keytocard/ and might be worth reporting upstream on https:/ /dev.gnupg. org/maniphest/ task/edit/ form/3/