When creating a polybar "button" for jgmenu, I came upon the issue described below. I'd be grateful for a steer on if it is the intended behaviour and if there is anything I could do to avoid it.

I use

• polybar v3.1.0 (build from Arch AUR two days ago)
• i3 v4.14.1
• Arch Linux

Using the default polybar config file (/usr/share/doc/polybar/config), I added:
modules-left = jgmenu bspwm i3
and

[module/jgmenu]
type = custom/script
label-padding = 2
interval = 10
exec = echo "menu"
click-left = "jgmenu_run &"

I found that "jgmenu_run" and "jgmenu" work in terms of launching jgmenu. However, when running jgmenu as a long-running application (default), I don't get polybar back (as described on wiki, so nothing strange about that).

However, "jgmenu_run &" and "jgmenu &" do not launch jgmenu. This is what's peculiar to me. These commands work from the terminal with the "&".

I found that the following works:
click-left = "jgmenu_run >/dev/null 2>&1 &"

The issue can be re-created without jgmenu, by setting "click-left = ~/test.sh &" and then doing the following:

cat <<EOF >~/test.sh
#!/bin/sh
echo "foo"
dmenu_run
EOF

If the 'echo "foo"' line is removed, it works.