Brady <bug-gnu-emacs_at_gnu.org@tangential.info> writes:

> I just tested in a debian VM as well, with snapd's emacs 27.1, and the
> same issue occurs, C-h k, then M-TAB to switch to other application
> shows ESC [ I- in minibuffer. Similarly issue is seen with
> TERM=xterm-256color but not with rxvt.

I can reproduce this with Emacs 28, too.

emacs -Q -nw
C-h k
*click in a different window*