What would explain this behavior?

Refer to the Exhibit.

A vSwitch has been configured as shown in the exhibit. The physical switch to which vmnic4 is attached failed and was replaced by the network team. Traffic is still moving over vmnic5.

What would explain this behavior?

A.
Once traffic moved to vmnic5, vmnic4 is considered Unused and must be manually reassigned.

B.
Failback is set to No.

C.
The ESXi host needs to be rebooted in order to change the active uplink.

D.
Network Failover Detection is set to Link Status Only.