dmenu script for pass

passmenu.sh

#!/usr/bin/env bash

# 1 - source copy from https://geluk.io/p/passmenu.sh (https://github.com/Baggykiin/pass-winmenu)
# 2 - make dmenu case insensitive
# 3 - correct include_username variable
# 4 - only pick out usernames if they are the start of the sentence, i.e. ignore non-primary usernames listed in the file (mostly for bitbucket)
# 5 - dependency test and install
# 6 - error output on bad argument

shopt -s nullglob globstar

typeit=0
include_username=1
editit=0
deps=0

while [[ -n "$1" ]]; do
	if [[ $1 == "--type" ]]; then
		typeit=1
	elif [[ $1 == "--no-username" ]]; then
		include_username=0
	elif [[ $1 == "--edit" ]]; then
		editit=1
	elif [[ $1 == "--install-dependencies" ]]; then
		deps=1
	elif [[ $1 == "--" ]]; then
		break;
        else
                echo "Error: unhandled argument $1." >&2
                exit 1
	fi
	shift
done

if [[ $deps -eq 1 ]]; then
	sudo apt install dmenu xclip xdotool -y
	exit
fi

if ! [ -x "$(command -v dmenu)" ]; then
	echo 'Error: dmenu is not installed.' >&2
	exit 1
fi

prefix=${PASSWORD_STORE_DIR-~/.password-store}
password_files=( "$prefix"/**/*.gpg )
password_files=( "${password_files[@]#"$prefix"/}" )
password_files=( "${password_files[@]%.gpg}" )

password=$(printf '%s\n' "${password_files[@]}" | dmenu -i "$@")

if [[ $editit -eq 1 ]]; then
		# Insert the edit command for your preferred terminal here:
		#termite -e "pass edit '$password' > /dev/null"
		#xterm "pass edit '$password' > /dev/null"
		#urxvt -e "pass edit '$password' > /dev/null"
		#gnome-terminal -- pass edit "$password" > /dev/null
		# ..etc
		exit
fi

[[ -n $password ]] || exit

if ! [ -x "$(command -v xclip)" ]; then
	echo 'Error: xclip is not installed.' >&2
	exit 1
fi

if [[ $typeit -eq 0 ]]; then
	pass show -c "$password" | xclip

else
	if ! [ -x "$(command -v xdotool)" ]; then
		echo 'Error: xdotool is not installed.' >&2
		exit 1
	fi

	pwfile=$(pass show "$password")
	password=$(printf "%s" "$pwfile" | sed -n 1p)
	username=$(printf "%s" "$pwfile" | grep -Po "^[Uu]ser(name)?: \K(.*)")
	printf '%s' "$password" | xclip -selection clipboard
	print '%s' "$password" | xclip
	if [ -z "$username" ] || [[ $include_username -eq 0 ]]; then
		printf '%s' "$password" | xdotool type --clearmodifiers --file -
	else
		pstr=$(printf '%s\t%s' "$username" "$password")
		xdotool type "$pstr"
	fi
fi

I have a few nested ones and they work fine

Maybe check your script for password_files=( "$prefix"/**/*.gpg )?