wait...even the most recent of these logs shows that it is testing notcurses 3.0.4, which indeed had this timing problem on input, which was fixed in notcurses 3.0.5:
Get:1 http://deb.debian.org/debian testing/main notcurses 3.0.4+dfsg.1-1 (dsc) [3,148 B] Get:2 http://deb.debian.org/debian testing/main notcurses 3.0.4+dfsg.1-1 (tar) [7,391 kB] Get:3 http://deb.debian.org/debian testing/main notcurses 3.0.4+dfsg.1-1 (asc) [833 B] Get:4 http://deb.debian.org/debian testing/main notcurses 3.0.4+dfsg.1-1 (diff) [17.1 kB] but apt-show-versions confirms only 3.0.7 in the archive: [schwarzgerat](0) $ apt-show-versions -a notcurses-bin notcurses-bin:amd64 3.0.7+dfsg.1-1 install ok installed No stable version No testing version notcurses-bin:amd64 3.0.7+dfsg.1-1 unstable ftp.us.debian.org No experimental version notcurses-bin:amd64/unstable 3.0.7+dfsg.1-1 uptodate [schwarzgerat](0) $ oh, i guess "No testing version" indicates it's gone from testing. so why isn't 3.0.7 in unstable the candidate for testing? 3.0.4 is definitely known to be bad.