Guys,
Just had feedback from Asus stating that they are convinced the latest firmware that we are all using 3.0.0.4.376_2139 should resolve our issues, but it was advised to reset and use defaults.
Clearly this is not the case for me, and I have replied back to Asus. If you have problems, please make sure you are reporting them back to Asus. The more feedback and information they get, the quicker we may get working firmware!