Why is my shell script variable not working as an argument for the top command?

Question

So I'm writing this simple script to pull the process ID of my app, and then run the "top" command with the value I pulled as the -p argument. The goal is to run the "top" command using the pid of our app to see what our CPU and MEM usage is like when tests are run overnight (outputting results to a file).

My script:

#!/bin/bash
pid=`pidof -s com.example.app`
echo $pid
top -o %CPU,%MEM -p $pid > /data/topresults.txt

I can see the echo outputting the right pid for my app, but when I try to push this script to the device and run it in the shell via 'sh data/gettop.sh', I see the following outputted logs:

PS C:\Users\user\AppData\Local\Android\Sdk\platform-tools> ./adb shell                                               
fca_dv2:/ # sh data/gettop.sh 
5889
'op: bad -p '5889
             ^

What exactly is failing here? Is it saying there's an extra ' symbol ahead of the pid I fed it, or is something else going on here? I'm not sure why it's failing to use the variable as the argument here.

Thanks for the assistance!