Repeated prompt to change passcode

Repeated prompt to change passcode

Rolling out a few iPads with iOS v12.  With only a few devices I am using the free tier of MDM.  One profile is assigned to all devices.  Within this profile the passcode settings are liberal.

Min length 4
Special characters NONE
Max idle time before auto-lock 5min
Max time to unlock without passcode 5min
Max failed attempts 9
Max passcode age 365
Number passcodes maintained in history 50

Users are prompted every week or so "Passcode Requirement You must set an iPad unlock passcode within 59 minutes."  The device has a passcode so the user has to reset it to a new code.

Thoughts on what is causing this repeated change of passcode?