dcdiag.exe /test:DNS > Delegation is broken for the domain

hi guys! (windows 2003+3 DCs+1domain+DNS Integrated zone)

After every restart, all of my DCs are deadly slow to show up the
domain and allow users to logon. Giving a look at the events, i found
that the DNS service is delaying 22 minutes to get started. That made
me try dcdiag.exe /test:DNS and got the following weird error message:

DNS server: 192.168.12.5 (dc1.mydomain.com.)
1 test failure on this DNS server
Delegation is broken for the domain
mydomain.com.MYDOMAIN.COM. on the DNS server 192.168.12.5

DNS server: 192.168.2.6 (dc2.mydomain.com.)
1 test failure on this DNS server
Delegation is broken for the domain
mydomain.com.MYDOMAIN.COM. on the DNS server 192.168.2.6

DNS server: 192.168.21.110 (dc3.mydomain.com.)
1 test failure on this DNS server
Delegation is broken for the domain
mydomain.com.MYDOMAIN.COM. on the DNS server 192.168.21.110

Any clue about this? This "mydomain.com.MYDOMAIN.COM" seems quite
weird to me.

Thanks beforehand!

.

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