DHCP message on outside interface

RouterOS General
1

When I turn on DHCP debug on 750Gv3 I get these messages 3 times every minutes:

dhcp,debug MikroTik: resending..
dhcp,debug,packet MikroTik: send ether1 -> ff02::1:2%4
dhcp,debug,packet MikroTik: type: solicit
dhcp,debug,packet MikroTik: transaction-id: a6b097
dhcp,debug,packet MikroTik:  -> clientid:  00030001 6c3b6b88 343e
dhcp,debug,packet MikroTik:  -> ia_na: 
dhcp,debug,packet MikroTik:    t1: 1800
dhcp,debug,packet MikroTik:    t2: 2880
dhcp,debug,packet MikroTik:    id: 0x1
dhcp,debug,packet MikroTik:  -> oro: 23 
dhcp,debug,packet MikroTik:  -> elapsed_time: 2
dhcp,debug,packet MikroTik:  -> rapid_commit:

Why do I see this message?
ClientID is my eth1 mac address (outside interface)

2

DHCPv6 client sends a Solicit message

3

My 750G gest IPv4 from my DHCP. IPv6 package is disabled, since I do not need it.
I do not see any place to disable IPv6 on the DHCP client side.
“/ipv6 dhcp-client” does not give any thing

4

If IPv6 package is disabled then router should not send any ipv6 packets.
Generate supout file and send it to support.

5

It’s a bug.
Solved by a work-around.
Enable IPv6, Disable IPv6 DHCP client. Disable IPv6.
It should not send out these message when IPv6 is disabled.