Hi, Usually we recommend that the management port be on a VLAN that the rest of the switch isn’t using. It has its own routing table, so it might be creating a loop with itself.
I have a bit of a strange issue with the dedicated management interface on an S6000 version 9.13 I have physically connected the management port to dedicated switch (untagged VLAN)  The same VLAN is configured on the S6000 switch.  What is strange is unless I add an IP to the interface VLAN on the S6000 the management traffic is very hit and miss. I may lose 70-80% of pings. As soon as I add a random non routable IP to the interface VLAN I dont lose any traffic. Anyone else come across this before?   
S6000 management interface connectivity issues