I just noticed this today, so not much background info.

I needed the MAC off a machine for troubleshooting a wifi issue, but it had no information in inventory. I checked another and it had the wifi MAC, but not the Intel integrated. Yet another had the Intel integrated, but not the wifi MAC.

I have a laptop for techs that shows 4 different MACs, including a Bluetooth adapter and a Microsoft Virtual adapter.

All the the laptops where imaged last August using ZCM 11.4.3 and Windows 10 1703. I upgraded to ZCM 2017 Update 1 a few weeks ago. I don't use Inventory a lot, so not sure when this started.