I seem to have a peculiar issue with MacOS Terminal (or iTerm) from time to time and I cannot pinpoint the cause.

Whenever I need to kill a program in Terminal, `Control` + `C` doesn't work. Terminal simply outputs `^Z` for every `Control` + `C`.

```
^Z^Z^Z^Z^Z^Z^Z
^Z^Z
^Z^Z^Z
^Z^Z^Z

```

It's not limited to `Control` + `C`:

* I get `^X` for `Control` + `X`
* `^C` for `Control` + `C`
* And so on.

It happens from time to time. Sometimes it's working, then it's not, then it's back again working.

What I've tried:

* Removed almost all Keyboard shortcuts that start with `Control`. I've left only those that start with `Control` + `F`.
* Keyboard Viewer does the same (ie. `^Z`).
* Modifier Keys are the default ones.
* Tried to switch between apps to determine if an app may "hijack" the `Control` key, but I cannot pinpoint if that's the cause and if so, what's that app (ie. Chrome, TextMate, Notes.app).
* Output of `stty -a`:

```
lflags: icanon isig iexten echo echoe echok echoke -echonl echoctl
    -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo
    -extproc
iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel iutf8
    -ignbrk brkint -inpck -ignpar -parmrk
oflags: opost onlcr -oxtabs -onocr -onlret
cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow
    -dtrflow -mdmbuf
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>;
    eol2 = <undef>; erase = ^?; intr = ^C; kill = ^U; lnext = ^V;
    min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T;
    stop = ^S; susp = ^Z; time = 0; werase = ^W;```

```