BPDUGuard Enabled and receiving BPDU from a host device, not a STP device.

We are experiencing a seemingly random event where a port will go errdisabled after receiving a BPDU from a Delta Controller.

Initially, I thought this was happening during commissioning of a new building, where they would power cycle these devices and move them from port to port. But, we are unable to reenact the issue while capturing packets to try and figure this out.

I was wondering if anyone else has seen this issue before?

We are running Cisco 3650x-48PD Switches. IOS 03.06.06.E.152-2.E6. All ports are Spanning-tree portfast and BPDUgaurd enabled.

Thanks,