Micro inside a subprocess doesn't Suspend properly

[kousu]

Description

I've enabled suspending in micro because I use it a lot with other editors:

$ cat ~/.config/micro/bindings.json 
{
    "Ctrl-j": "",
    "Ctrl-u": "Undo",
    "Ctrl-z": "Suspend"
}

I also have some helper scripts that wrap up my editors to speed up this and that workflow. Distilled down, they all basically do this:

#!/bin/sh
# wrap.sh

set -ex
"$@"

If I run

./wrap.sh nano 

./wrap.sh vim 

./wrap.sh helix 

then ctrl-z works like I expect, it jumps me back to my shell:

$ ./wrap.sh helix
+ helix

[1]+  Stopped                    ./wrap.sh helix

but with micro, I have to press ctrl-z twice to get back to the shell; the first one closes micro but hangs

$ ./wrap.sh micro 
+ micro

until I press ctrl-z again

$ ./wrap.sh micro 
+ micro
^Z
[1]+  Stopped                    ./wrap.sh micro

Something is super obscure and weird here.

Environment

• Version: 2.0.15
• OS: ArchLinux
• Terminal: kgx (gnome terminal)