Win Svr 2012 BPA show error for DC's that Default Domain Controller Policy is not applied to Domain Controllers OU, but it is :)

Hi :)

I have 3 DC's (Win Svr 2012) and Server Manager / AD BPA claims error:

The Default Domain Controllers Policy in the domain sub_domain_name.tld_domain_name should be applied to the OU OU=Domain Controllers,DC=sub_domain_name,DC=tld_domain_name

DC's are in Domain Controllers OU, GPO is linked and not blocked (etc...) and when I run GP results wizard against those 3 DC's and my domain admin account I've get status that DDCP is applied.

What might be wrong ?

Best regards

Nenad