From the tee I see that ncursesw is used as the line graphs are UTF-8 based e2 94 80 which is U+2500, compare with https://www.utf8-chartable.de/unicode-utf8-table.pl?start=9472&unicodeinhtml=dec looks like a wrong UTF-8 locale setup on the terminal line or a console font which wrong UTF-8 line glyphs.