bug#45834: 28.0.50; Mouse events in terminal emacs

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bug#45834: 28.0.50; Mouse events in terminal emacs

Tested with emacs -Q -nw, in Terminal.app, with TERM=xterm-256color. The issue does not reproduce with TERM=rxvt.

If I press "C-h k", and then switch to another application, then this is registered as "ESC [ I-", and then upon switching back, as "ESC [ O-". I think this is about mouse events, in and out, or "I" and "O".

I think since I actually have M-[ bound to resize windows (without -Q), then this allows I and O to be passed to emacs and inserted as text, or for more strange behavior in other modes like evil or magit.

I'm not sure if this is considered an emacs problem, or if there is an idea for a workaround, besides perhaps unbinding M-[.

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.

Thank you,

In GNU Emacs 28.0.50 (build 1, x86_64-apple-darwin19.6.0, NS appkit-1894.60 Version 10.15.7 (Build 19H2))
 of 2020-10-25 built on clay.local
Repository revision: 10ea719abcde4f2ee40e717eb846fe93f51d5d79
Repository branch: master
System Description:  Mac OS X 10.15.7

Configured features:

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
rfc822 mml mml-sec epa derived epg epg-config gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json map text-property-search time-date
subr-x mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
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vc-hooks lisp-float-type mwheel term/ns-win ns-win ucs-normalize
mule-util term/common-win tool-bar dnd fontset image regexp-opt fringe
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loaddefs faces cus-face macroexp files window text-properties overlay
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make-network-process emacs)

Memory information:
((conses 16 61436 5322)
 (symbols 48 6973 1)
 (strings 32 19556 966)
 (string-bytes 1 625828)
 (vectors 16 9903)
 (vector-slots 8 124271 9350)
 (floats 8 95 309)
 (intervals 56 351 0)
 (buffers 992 12))