Interesting that Tubes works ok, at least there's no many complains about Tubes. I would check quality of power delivered to chips with oscilloscope. Maybe DC/DC converter is oscillating and couses trouble..
I am pretty sure that these are string miners? The chips are powered differently than the tubes. Why is it that AM will not even bother to support these? Who would buy anything from them in the future after they just ignore all these issues? AM needs to watch how Bitmain and SP-Tech handle issues and learn from them. This company flat out sucks for end users...they can't not even be bothered to reply to emails.