Hi @dimSpark ,
Thanks for raising this to us. If same thing happen on D-Link viper ac2600, have you tried to use TPG's supplied modem/router for testing purposes?
We tried to use your community details to pull up the account unfortunately it shows no matching records found, please send me your accoutn details (Username/Customer ID) together with the address on file, to better understand the situation.
For reference: How do I private message (PM) in the community