I am also interested in trying out the DX160 and it appears that this is a common issue where the customer can see the issue but the vendor cannot see it at least at this moment.
In my humble observations, the fundamental thing here is for the vendor to try to reproduce the issue by recreating the exact environment (if possible) and following the steps by which the user was experiencing the issue. To this end, for those of you who have experienced the Wifi/Bluetooth issues, you need to provide to iBasso when reporting your issue(s), the environment in which you are experiencing the issue (for example, how many other bluetooth devices are within the vicinity, like phone(s), laptop, notepad/ipad, etc... that have their bluetooth feature turned on, etc...) and the step by step events while using the DX160 that lead you to experience this issue.
Without such information (environments + steps to reproduce the issue), it will be difficult for both the consumer and the vendor to come into the same "wavelength" conversation so that a solution can be discussed. In the absence of such crucial information to reproduce the issue, I can see the consumer continues to jump and down saying that the DX160 is not working with Wifi/Bluetooth, while Ibasso continues to say they are exercising these functionalities and do not observe any issues. What we are failing to ask here are how (environment + steps) does the consumer experience this issue and how (environment + steps) does the iBasso exercise these functionalities?