Better Software Updates with End User Interaction

Greetings!

I've been using this script that I found here that @kitzy kindly shared (thanks!) to display a prompt to close apps before installing updates. And so far it's been working pretty well, however, I have discovered that in some cases I'm getting false positives. I've found that if I hardcode the variables into the script instead of passing parameters from the JSS I get more accurate results. Any ideas what I could be doing wrong?

#!/bin/bash

# Path for JAMF Helper - this should not need to be changed
jamfHelper='/Library/Application Support/JAMF/bin/jamfHelper.app/Contents/MacOS/jamfHelper'

## Assign variables from JSS
applicationTitle="$4"
processNames="$5"
customTrigger="$6"

IFS="," # Set internal field separator to comma to saparate process names

####################################################################
######## Use the below variables to change the alert window ########
####################################################################

# Title of the alert window
title="PRAHS Information Technology Alert!"

# Icon displayed in the alert window
icon="/Library/User Pictures/PRAHS/PRA_Health_Sciences_256x256.png"

# Bold heading of the alert window
heading1="Update ${applicationTitle}"

# Main text of the alert window
description1="needs to quit before ${applicationTitle} can be updated. 

Click OK to close the application and continue."

###########################
######## Functions ########
###########################

function promptUser()
{
# This is the main prompt function. It relies on the heading, description and process name
# passed to it as parameters 1, 2 and 3, respectively. Even though we're only using this once
# by default, this part was written as a function to simplify the code if the script is expanded
# to provide more prompts for the user.

    promptResult=""

    promptResult=`"${jamfHelper}" -lockHUD -windowType utility -icon "$icon" 
    -title "$title" 
    -heading "$1" 
    -alignHeading left 
    -description "$3 $2" 
    -button1 "OK" -button2 "Cancel" 
    -defaultButton "1"`
}

####################################
######## Begin main program ########
####################################

for process in $processNames
do

PID="" # Clear PID to elimnate false positives

PID=`pgrep "$process"` # Get application PID

if [ ! -z "$PID" ] # Detect if application is running
    then
        # Prompt user to quit the running application
        echo "$process is running, prompting user to quit"
        promptUser "$heading1" "$description1" "$process"
        if [[ $promptResult = 0 ]] # 0 indicates user clicked button 1
            then
                echo "User clicked OK"
                # Ask application to quit
                osascript -e "tell application "$process" to quit"
        elif [[ $promptResult = 2 ]] # 2 indicates user clicked button 2
            then
                # Echo for the log, then exit
                echo "User clicked Cancel"
                exit 0
        elif [[ $promptResult = 1 ]] # 1 indicates jamfHelper was unable to launch
            then
                echo "ERROR: jamfHelper returned status 1: unable to launch"
                exit 1
            else
                # If jamfHelper returns anything other than 0, 1 or 2,
                # report an error to the JSS and exit
                echo "ERROR: an unknown error occurred"
                exit 2
        fi
    else
        echo "$process not running, moving on"
fi

done

    # Call the install policy via custom trigger without prompting user
    jamf policy -event $customTrigger
    exit 0

Thanks!