iBasso have said they are looking into it, and have been responding:
iBasso (and DX160 users) probably wants this sorted as soon as possible - and no doubt will report back on the BT and Wifi questions/issues when they have identified what is the issue, or not. And have something concrete to present after their testing.
Head-fiers who have been on the other iBasso threads knows iBasso looks after their customers and do their best to attend to any issues asap.
BT - Not sure what is happening there. I have not done extensive tests myself. Leaving that up to iBasso.
Wifi - no doubt they are testing this also. I could find no issue with my device.
Hissing/waterfall sound. Reports indict the usual suspects: sensitive IEMs. (But typically not with some other not as sensitive IEMs/headphones).
*Even though Overall the DX160 has quite a low floor noise.
Anyway. I guess for now we wait until the tests are done by the engineers and then get a report.