UPN Not getting updated on Azure

Hello team,

Infrastructure:

we are currently supporting Windows Autopilot (Entra Hybrid Joined). As expected, we see two device objects in Azure for each device we provision. One for Entra joined and another one for Entra Hybrid joined.

Issue:

Sometimes we receive requests to change the primary user of a device in Intune. When we change the primary user in intune, the new UPN is getting updated only on "Entra Hybrid Joined" object in Azure. If I check the "Entra joined" object, we still see the UPN of whom initially provisioned the device. It is not possible to update the UPN in Azure or delete the object.

Due to this issue, the azure device limit has been reached for many service desk persons who help employees to setup the devices on behalf of users.