This Forum Beta is ONLY for registered owners of D-Link products in the USA for which we have created boards at this time.
Trying to see if by shutting off IPv6 services, will the DAP still exhibit the same manor or not. Just a troubleshooting step is all. I'd contact your regional D-link support again and talk to someone level 2 or higher. Let us know how it goes.
This via email or phone? I recommend phone support for more immediate results...
D-Link support sent me a new firmware with debug options, I'll keep you guys posted of the results