Thanks - I personally reached out to support for a more concrete answer. Its been 4 days and I have heard nothing, so still waiting. Disabling MQA is not palatable, as it is one of the reasons I bought the DAC (see above - "without disabling settings.")
Ultimately, there is a cause that can be explained. Not to be a pain, but factually speaking the answer provided from support is ambiguous and is an example of "Attribute Substitution" (When someone tries to answer a difficult question, they may actually answer a related but different question, without realizing that a substitution has taken place - example, "Lots of others DACs experience the click" does not answer why THIS one does, and more importantly, how to manage it.)
(
https://en.wikipedia.org/wiki/Attribute_substitution#:~:text=Attribute substitution, also known as,cognitive biases and perceptual illusions.&text=This substitution is thought of,more self-aware reflective system.)
Also, there is no issued firmware that disables MQA - see
https://ifi-audio.com/download-hub/ - I am running the GTO Firmware. Both the Cookies and Cream and GTO firmware experience the same problem - I just happen to like the sound signature on the GTO firmware. It should also be noted that I bought the ifi low noise 5v power supply. It really is helpful in creating a very "dark" background, as the power is coming from a PSU, leaving the USB on the DAC to do nothing but transmit data as opposed to also providing power. This unfortunately does nothing to eliminate the clicking.
Again, love the sound. The click is just something that I can hear clearly and I am sensitive to it. If its impossible to make 'go away" - why? Many other forums indicate that its the DACs inability to handle sample rate changes without sending noise into the signal. Is that the USB connection? Is it the onboard switching? Burr Brown Chip?