Password Age Reset After OS Upgrade

Hi. I noticed that after my users upgraded to macOS Sierra, their password age reset to 0. Has anyone else notice the same thing? I'm using the EA below to check pw age. Not sure where it came from as I inherited this JSS.

#!/usr/bin/python2.7
import datetime
import plistlib
import subprocess

# Obtain username from last logged in user
user = plistlib.readPlistFromString(subprocess.check_output(['/usr/bin/syslog', '-F', 'xml', '-k', 'Facility', 'com.apple.system.lastlog', '-k', 'Sender', 'loginwindow']))[-1]['ut_user']

# Use 'dcsl' to read 'PasswordPolicyOptions' data
# This first method works on 10.9 or earlier clients, or 10.10 clients that migrated from earlier versions
output = subprocess.check_output(['/usr/bin/dscl', '.', '-read', '/Users/' + user, 'PasswordPolicyOptions'])
try:
    plist = plistlib.readPlistFromString('
'.join(output.split()[1:]))

    # When read from 'PasswordPolicyOptions' the date is a 'datetime' object
    lastSetDate = plist['passwordLastSetTime'].date()
except Exception:
    # If 'passwordLastSetTime' does not exist the data will be found in 'accountPolicyData'
    # This is expected on 10.10 or newer clients that were not migrated
    output = subprocess.check_output(['/usr/bin/dscl', '.', '-read', '/Users/' + user, 'accountPolicyData'])
    try:
        # The syntax below strips the first line from 'output' which is not valid XML
        plist = plistlib.readPlistFromString('
'.join(output.split()[1:]))

        # When read from 'accountPolicyData' the date is in a floating point/real number timestamp format
        lastSetDate = datetime.datetime.utcfromtimestamp(plist['passwordLastSetTime']).date()
    except Exception:
        try:
            # If 'passwordLastSetTime' does not exist fall back to the account creation timestamp
            lastSetDate = datetime.datetime.utcfromtimestamp(plist['creationTime']).date()
        except Exception:
            # If unable to determine any usable timestamp from the above, exit with a 'No Value' result
            print("<result>No Value</result>")
            raise SystemExit

# 'datetime' supports addition and subtraction between 'datetime.date' objects
# We use this here to obtain the number of days from today and the 'lastSetDate'
today = datetime.datetime.utcnow().date()
passwordAge = (today - lastSetDate).days

# Output the result for the extension attribute
print("<result>{0}</result>".format(passwordAge))

If anyone has an EA that works better (or you haven't seen the issue), please share!

Thanks!