Got my 3 pieces late yesterday.
Plugged them in, all started hashing into default settings.
As soon as I input my credentials(for Nicehash 1st, as Antpool has disabled SIA poll suddenly), all 3 refused to connect.
Then I tried Nanopool, same issue.
As soon as you reset them to factory, they connect, very slow and after few restarts, but they connect.
Tried MPHub, same issue.
The only pools they connect to and work almost constant are SiaMining and Luxor.
I must say there's not a network issue, as I got 2 D3's just next to them working flawlessly.
Right now they hashing at 820-845 each at around 88-90 chip temps. I set blowers to max, as I don't like those temps...

Any other experiences to share?