Well, it looks like our old friend who has been there since 4.0 has returned. There had been earlier issues of such behavior. This happens when vmk0-assigned for Managment and vmk1 assigned for Vmotion gets inter-changed. and vmotion having vmk0 and Mgmt having vmk1. Can you confirm if this is the case in your setup.?
If yes, then do please have a looksy at here